CIS-043-52219 : Java How to program Solutions Manual 10th,11th,12th edition

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Download Solutions of Java How to program 9th Edition  -

Assignment's Solutions

Ex 4.23 (Find the Two Largest Numbers) Using an approach similar to that for Exercise 4.21, find
the two largest values of the 10 values entered. [Note: You may input each number only once.]

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Ex 4.30 (Palindromes) A palindrome is a sequence of characters that reads the same backward as forward.
For example, each of the following five-digit integers is a palindrome: 12321, 55555, 45554
and 11611. Write an application that reads in a five-digit integer and determines whether it’s a palindrome.
If the number is not five digits long, display an error message and allow the user to enter
a new value.

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Ex 5.21(Pythagorean Triples) A right triangle can have sides whose lengths are all integers. The set
of three integer values for the lengths of the sides of a right triangle is called a Pythagorean triple.
The lengths of the three sides must satisfy the relationship that the sum of the squares of two of the
sides is equal to the square of the hypotenuse. Write an application that displays a table of the
Pythagorean triples for side1, side2 and the hypotenuse, all no larger than 500. Use a triple-nested
for loop that tries all possibilities. This method is an example of “brute-force” computing. You’ll
learn in more advanced computer science courses that for many.

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Ex 5.24(Diamond Printing Program) Write an application that prints the following diamond
shape. You may use output statements that print a single asterisk (*), a single space or a single newline
character. Maximize your use of repetition (with nested for statements), and minimize the
number of output statements.

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Ex 5.25 (Modified Diamond Printing Program) Modify the application you wrote in Exercise 5.24
to read an odd number in the range 1 to 19 to specify the number of rows in the diamond. Your
program should then display a diamond of the appropriate size.

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Ex 5.29 (“The Twelve Days of Christmas” Song) Write an application that uses repetition and
switch statements to print the song “The TwelveDays of Christmas.” One switch statement should
be used to print the day (“first,” “second,” and so on). A separate switch statement should be used
to print the remainder of each verse. Visit the website en.wikipedia.org/wiki/The_Twelve_Days_
of_Christmas_(song) for the lyrics of the song.

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Text Book Questions : 

Advanced Object Oriented Programming-2 (PROG36859) Assignment

INSTRUCTIONS

 This assignment must be completed without any outside collaboration in a group of 2 (two) students (Students can form their own groups.) Copying or reproducing the work done by others (in part or in full) or letting others to copy or reproduce your own, and/or unauthorized collaboration will be treated as academic dishonesty under the College’s Academic Dishonesty Policy.

 This is an out of class assignment and you are required to complete this assignment at your own time.

 Your application must compile and run upon download to receive any mark. Your supplied outputs (e.g., screenshots) may not be marked, if the corresponding program fails to compile and run.

 Late submissions will be subject to a reduction in the grade earned as follows: A penalty of 10% of the value of the assignment will be immediately deducted for late submissions. An additional 10% of the value of the assignment will be deducted for each subsequent day (includes weekends and holidays) to a maximum of 3 days at which point the assignment will be assigned a mark of “zero”.

 To submit the assignments, please follow the Submission Guideline provided at the end of this assignment.

 Each group (both members) MUST demonstrate their work and simulation during the class/lab session on Sep 27th, 2019. Both members must be able to demonstrate the complete work. Demonstration is important and missing it may cost significant part (at least 40%) of this assignment marks.

 You must include following information as comments at the beginning of your main class file. o Assignment No.: 1 o Member 1: , o Member 2: , o Submission date: o Instructor’s name: Syed Tanbeer

 Total mark = 20 (weight = 10% of the final grade).

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Play Card Game

Create a Java program that will simulate a card game in which four players will play the game with a deck of cards. Assume the deck of cards represents a typical playing deck of cards containing 52 cards that has a face rank (e.g., “Ace”, “Deuce”, “Three”…………”Ten”, “Jack”, “Queen”, “King”) and a suit (e.g., “Spades”, “Hearts”, “Diamonds”, “Clubs”). Each suit has 13 cards one for each face. Table 1 and Table 2 show a mapping for the suits and card faces, respectively. You should use these integer code values, NOT the string names, in your simulation program to represent a suit and a card face rank. For example, the code for the card ‘Five of Spade’ should be two integer values as 3 5, where the first value indicates the suite rank (i.e., Spade) and the second value indicates the face rank. Similarly, ‘Ace of Clubs’ = 0 14, ‘Jack of Hearts = 2 11, and so on.

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Rules to play:

 

Step 1 (Shuffle): Shuffle all cards (52 cards in the deck of cards) to obtain a random order for the cards in the deck.

 

Step 2 (Distribute): Distribute the cards among four players in 13 rounds, starting from the first card in the shuffled deck of cards, i.e., one player will get 1 card from the randomly shuffled deck of card in each round. For example, in the 1st round of distribution, Player-1 will receive the 1st card, Player-2 will receive the 2nd card, Player-3 will receive the 3rd card, and Player-4 will receive the 4th card. In the 2nd round of distribution, Player-1 will receive the 5th card, Player-2 will receive the 6th card, Player-3 will receive the 7th card, and Player-4 will receive the 8th card, and so on. Thus, at the end of the distribution, each player will receive 13 random cards.

 

Step 3 (Play): There will be 13 rounds of deal in the play. For each round, each player will deal (i.e., play) one card. Each player will play a card in the opposite order he/she received the cards. For example, for the 1st round of deal, all players will play the cards that they received in the 13 th round of distribution. Similarly, in the 2nd round of deal, they will play the cards they received in the 12 th round of distribution, and so on.

 

Step 4 (Find deal winner): The winner of a deal will be selected based on the face ranks of the cards played by four players. The player who plays the card with the highest face among all four cards in a deal is the winner of that deal. For example, assume the status of the 1st round deal (Deal number 01) of a typical play is as follows (where the first digit indicates face value and the second digit is for suit number). Deal number 01: 3 0, 12 2, 10 0, 4 1 It displays the cards played by all players in sequence of players’ order (i.e., Player-1 has played card 3 0, which is 3 of Clubs, Player-2 has played card 12 2, Player-3 has played 10 0, and Player-4 has played the card 4 1. The winner of this deal is Player-2 (who played the card with the highest face value, i.e., 12). If there is a tie on face values (among more than one cards), the winner will be selected based on the suit rank of cards (the higher suit value will get higher rank). For example, if the status of a round of deal is as follows: Deal number 01: 3 3, 11 2, 7 0, 11 1 Then, the winner of this deal is Player-2 (Player-2 and Player-4 played the highest ranked cards (i.e., 11) in the deal, but Player-2 played a higher suit (i.e., 2) card).

 

Step 5 (Select the Winner): The overall winner of the game is/are the player(s) who win(s) the highest number of deals among all 13 deals. If there is a tie, add up the face values of all winning deals for each tied player. The player with higher total face value will be the winner. If still there is a tie, all tied players are considered as the winner.

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Chapter - 2 Programming Assignment CIS-043-52219 Solutions Manual

2.14 Write an application that displays the numbers 1 to 4 on the same line, with each pair of

adjacent numbers separated by one space. Use the following techniques:

a) Use one System.out.println statement.

b) Use four System.out.print statements.

c) Use one System.out.printf statement.

 

2.15 (Arithmetic) Write an application that asks the user to enter two integers, obtains them

from the user and prints their sum, product, difference and quotient (division). Use the techniques

shown in Fig. 2.7.

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2.16 (Comparing Integers) Write an application that asks the user to enter two integers, obtains

them from the user and displays the larger number followed by the words "is larger". If the numbers

are equal, print the message "These numbers are equal". Use the techniques shown in Fig. 2.15.

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2.17 (Arithmetic, Smallest and Largest) Write an application that inputs three integers from the

user and displays the sum, average, product, smallest and largest of the numbers. Use the techniques

shown in Fig. 2.15. [Note: The calculation of the average in this exercise should result in an integer

representation of the average. So, if the sum of the values is 7, the average should be 2, not

2.3333….]

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2.18 (Displaying Shapes with Asterisks) Write an application that displays a box, an oval, an arrow

and a diamond using asterisks (*), as follows:

2.19 What does the following code print?

System.out.printf("*%n**%n***%n****%n*****%n");

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2.20 What does the following code print?

System.out.println("*");

System.out.println("***");

System.out.println("*****");

System.out.println("****");

System.out.println("**");

 

2.21 What does the following code print?

System.out.print("*");

System.out.print("***");

System.out.print("*****");

System.out.print("****");

System.out.println("**");

 

2.22 What does the following code print?

System.out.print("*");

System.out.println("***");

System.out.println("*****");

System.out.print("****");

System.out.println("**");

 

2.23 What does the following code print?

System.out.printf("%s%n%s%n%s%n", "*", "***", "*****");

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2.24 (Largest and Smallest Integers) Write an application that reads five integers and determines

and prints the largest and smallest integers in the group. Use only the programming techniques you

learned in this chapter.

********* *** * *

* * * * *** * *

* * * * ***** * *

* * * * * * *

* * * * * * *

* * * * * * *

* * * * * * *

* * * * * * *

********* *** * *

 

2.25 (Odd or Even) Write an application that reads an integer and determines and prints whether

it’s odd or even. [Hint: Use the remainder operator. An even number is a multiple of 2. Any multiple

of 2 leaves a remainder of 0 when divided by 2.]

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2.26 (Multiples) Write an application that reads two integers, determines whether the first is a

multiple of the second and prints the result. [Hint: Use the remainder operator.]

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2.27 (Checkerboard Pattern of Asterisks) Write an application that displays a checkerboard pattern,

as follows:

 

2.28 (Diameter, Circumference and Area of a Circle) Here’s a peek ahead. In this chapter, you

learned about integers and the type int. Java can also represent floating-point numbers that contain

decimal points, such as 3.14159. Write an application that inputs from the user the radius of a circle

as an integer and prints the circle’s diameter, circumference and area using the floating-point value

3.14159 for ð. Use the techniques shown in Fig. 2.7. [Note: You may also use the predefined constant

Math.PI for the value of ð. This constant is more precise than the value 3.14159. Class Math

is defined in package java.lang. Classes in that package are imported automatically, so you do not

need to import class Math to use it.] Use the following formulas (r is the radius):

diameter = 2r

circumference = 2ðr

area = ðr2

Do not store the results of each calculation in a variable. Rather, specify each calculation as the

value that will be output in a System.out.printf statement. The values produced by the circumference

and area calculations are floating-point numbers. Such values can be output with the format

specifier %f in a System.out.printf statement. You’ll learn more about floating-point

numbers in Chapter 3.

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2.29 (Integer Value of a Character) Here’s another peek ahead. In this chapter, you learned about

integers and the type int. Java can also represent uppercase letters, lowercase letters and a considerable

variety of special symbols. Every character has a corresponding integer representation. The set

of characters a computer uses together with the corresponding integer representations for those

characters is called that computer’s character set. You can indicate a character value in a program

simply by enclosing that character in single quotes, as in 'A'.

You can determine a character’s integer equivalent by preceding that character with (int), as in

(int) 'A'

An operator of this form is called a cast operator. (You’ll learn about cast operators in Chapter 4.)

The following statement outputs a character and its integer equivalent:

System.out.printf("The character %c has the value %d%n", 'A', ((int) 'A'));

When the preceding statement executes, it displays the character A and the value 65 (from the Unicode

® character set) as part of the string. The format specifier %c is a placeholder for a character (in

this case, the character 'A').

Using statements similar to the one shown earlier in this exercise, write an application that displays

the integer equivalents of some uppercase letters, lowercase letters, digits and special symbols.

Display the integer equivalents of the following: A B C a b c 0 1 2 $ * + / and the blank character.

* * * * * * * *

* * * * * * * *

* * * * * * * *

* * * * * * * *

* * * * * * * *

* * * * * * * *

* * * * * * * *

* * * * * * * *

 

2.30 (Separating the Digits in an Integer) Write an application that inputs one number consisting

of five digits from the user, separates the number into its individual digits and prints the digits

separated from one another by three spaces each. For example, if the user types in the number 42339,

the program should print

4   2   3   3   9

Assume that the user enters the correct number of digits. What happens when you enter a

number with more than five digits? What happens when you enter a number with fewer than five

digits? [Hint: It’s possible to do this exercise with the techniques you learned in this chapter. You’ll

need to use both division and remainder operations to “pick off ” each digit.]

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2.31 (Table of Squares and Cubes) Using only the programming techniques you learned in this

chapter, write an application that calculates the squares and cubes of the numbers from 0 to 10 and

prints the resulting values in table format, as shown below.

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2.32 (Negative, Positive and Zero Values) Write a program that inputs five numbers and determines

and prints the number of negative numbers input, the number of positive numbers input and

the number of zeros input.

Making a Difference

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2.33 (Body Mass Index Calculator) We introduced the body mass index (BMI) calculator in

Exercise 1.10. The formulas for calculating BMI are

or

Create a BMI calculator that reads the user’s weight in pounds and height in inches (or, if you prefer,

the user’s weight in kilograms and height in meters), then calculates and displays the user’s

body mass index. Also, display the following information from the Department of Health and

Human Services/National Institutes of Health so the user can evaluate his/her BMI:

4 2 3 3 9

number square cube

0 0 0

1 1 1

2 4 8

3 9 27

4 16 64

5 25 125

6 36 216

7 49 343

8 64 512

9 81 729

10 100 1000

BMI VALUES

Underweight: less than 18.5

Normal: between 18.5 and 24.9

Overweight: between 25 and 29.9

Obese: 30 or greater

BMI weightInPounds × 703

heightInInches × heightInInches

= ------------------------------------------------------------------------------------

BMI weightInKilog rams

heightInMeters × heightInMeters

= --------------------------------------------------------------------------------------

 

[Note: In this chapter, you learned to use the int type to represent whole numbers. The BMI calculations

when done with int values will both produce whole-number results. In Chapter 3 you’ll

learn to use the double type to represent numbers with decimal points. When the BMI calculations

are performed with doubles, they’ll both produce numbers with decimal points—these are called

“floating-point” numbers.]

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2.34 (World Population Growth Calculator) Use the web to determine the current world population

and the annual world population growth rate. Write an application that inputs these values,

then displays the estimated world population after one, two, three, four and five years.

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2.35 (Car-Pool Savings Calculator) Research several car-pooling websites. Create an application

that calculates your daily driving cost, so that you can estimate how much money could be saved by

car pooling, which also has other advantages such as reducing carbon emissions and reducing traffic

congestion. The application should input the following information and display the user’s cost per

day of driving to work:

a) Total miles driven per day.

b) Cost per gallon of gasoline.

c) Average miles per gallon.

d) Parking fees per day.

e) Tolls per day.

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Chapter - 3 Programming Assignment CIS-043-52219 

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3.11 (Modified Account Class) Modify class Account (Fig. 3.8) to provide a method called withdraw

that withdraws money from an Account. Ensure that the withdrawal amount does not exceed

the Account’s balance. If it does, the balance should be left unchanged and the method should print

a message indicating "Withdrawal amount exceeded account balance." Modify class AccountTest

(Fig. 3.9) to test method withdraw.

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3.12 (Invoice Class) Create a class called Invoice that a hardware store might use to represent

an invoice for an item sold at the store. An Invoice should include four pieces of information as

instance variables—a part number (type String), a part description (type String), a quantity of the

item being purchased (type int) and a price per item (double). Your class should have a constructor

that initializes the four instance variables. Provide a set and a get method for each instance variable.

In addition, provide a method named getInvoiceAmount that calculates the invoice amount (i.e.,

multiplies the quantity by the price per item), then returns the amount as a double value. If the

quantity is not positive, it should be set to 0. If the price per item is not positive, it should be set to

0.0. Write a test app named InvoiceTest that demonstrates class Invoice’s capabilities.

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3.13 (Employee Class) Create a class called Employee that includes three instance variables—a

first name (type String), a last name (type String) and a monthly salary (double). Provide a constructor

that initializes the three instance variables. Provide a set and a get method for each instance

variable. If the monthly salary is not positive, do not set its value. Write a test app named EmployeeTest

that demonstrates class Employee’s capabilities. Create two Employee objects and display each

object’s yearly salary. Then give each Employee a 10% raise and display each Employee’s yearly salary

again.

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3.14 (Date Class) Create a class called Date that includes three instance variables—a month (type

int), a day (type int) and a year (type int). Provide a constructor that initializes the three instance

variables and assumes that the values provided are correct. Provide a set and a get method for each

instance variable. Provide a method displayDate that displays the month, day and year separated

by forward slashes (/). Write a test app named DateTest that demonstrates class Date’s capabilities.

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3.15 (Removing Duplicated Code in Method main) In the AccountTest class of Fig. 3.9, method

main contains six statements (lines 13–14, 15–16, 28–29, 30–31, 40–41 and 42–43) that each display

an Account object’s name and balance. Study these statements and you’ll notice that they differ

only in the Account object being manipulated—account1 or account2. In this exercise, you’ll define

a new displayAccount method that contains one copy of that output statement. The method’s parameter

will be an Account object and the method will output the object’s name and balance. You’ll

then replace the six duplicated statements in main with calls to displayAccount, passing as an argument

the specific Account object to output.

Modify class AccountTest class of Fig. 3.9 to declare the following displayAccount method

after the closing right brace of main and before the closing right brace of class AccountTest:

public static void displayAccount(Account accountToDisplay)

{

// place the statement that displays

// accountToDisplay's name and balance here

}

Replace the comment in the method’s body with a statement that displays accountToDisplay’s

name and balance.

Recall that main is a static method, so it can be called without first creating an object of the

class in which main is declared. We also declared method displayAccount as a static method.

When main needs to call another method in the same class without first creating an object of that

class, the other method also must be declared static.

Once you’ve completed displayAccount’s declaration, modify main to replace the statements

that display each Account’s name and balance with calls to displayAccount—each receiving as its

argument the account1 or account2 object, as appropriate. Then, test the updated AccountTest

class to ensure that it produces the same output as shown in Fig. 3.9.

 

3.16 (Target-Heart-Rate Calculator) While exercising, you can use a heart-rate monitor to see that

your heart rate stays within a safe range suggested by your trainers and doctors. According to the American

Heart Association (AHA) (www.americanheart.org/presenter.jhtml?identifier=4736), the

formula for calculating your maximum heart rate in beats per minute is 220 minus your age in years.

Your target heart rate is a range that’s 50–85% of your maximum heart rate. [Note: These formulas are

estimates provided by the AHA. Maximum and target heart rates may vary based on the health, fitness

and gender of the individual. Always consult a physician or qualified health-care professional before

beginning or modifying an exercise program.] Create a class called HeartRates. The class attributes

should include the person’s first name, last name and date of birth (consisting of separate attributes for

the month, day and year of birth). Your class should have a constructor that receives this data as parameters.

For each attribute provide set and get methods. The class also should include a method that

calculates and returns the person’s age (in years), a method that calculates and returns the person’s

maximum heart rate and a method that calculates and returns the person’s target heart rate. Write a

Java app that prompts for the person’s information, instantiates an object of class HeartRates and

prints the information from that object—including the person’s first name, last name and date of

birth—then calculates and prints the person’s age in (years), maximum heart rate and target-heart-rate

range.

 

3.17 (Computerization of Health Records) A health-care issue that has been in the news lately is

the computerization of health records. This possibility is being approached cautiously because of

sensitive privacy and security concerns, among others. [We address such concerns in later exercises.]

Computerizing health records could make it easier for patients to share their health profiles and histories

among their various health-care professionals. This could improve the quality of health care,

help avoid drug conflicts and erroneous drug prescriptions, reduce costs and, in emergencies, could

save lives. In this exercise, you’ll design a “starter” HealthProfile class for a person. The class attributes

should include the person’s first name, last name, gender, date of birth (consisting of separate

attributes for the month, day and year of birth), height (in inches) and weight (in pounds). Your class

should have a constructor that receives this data. For each attribute, provide set and get methods.

The class also should include methods that calculate and return the user’s age in years, maximum

heart rate and target-heart-rate range (see Exercise 3.16), and body mass index .

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Exercise 2.33). Write a Java app that prompts for the person’s information, instantiates an object of

class HealthProfile for that person and prints the information from that object—including the person’s

first name, last name, gender, date of birth, height and weight—then calculates and prints the

person’s age in years, BMI, maximum heart rate and target-heart-rate range. It should also display

the BMI values chart from Exercise 2.33.

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Chapter - 4 - 5 Programming Assignment CIS-043-52219 

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4.17 (Gas Mileage) Drivers are concerned with the mileage their automobiles get. One driver has

kept track of several trips by recording the miles driven and gallons used for each tankful. Develop

a Java application that will input the miles driven and gallons used (both as integers) for each trip.

The program should calculate and display the miles per gallon obtained for each trip and print the

combined miles per gallon obtained for all trips up to this point. All averaging calculations should

produce floating-point results. Use class Scanner and sentinel-controlled repetition to obtain the

data from the user.

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4.18 (Credit Limit Calculator) Develop a Java application that determines whether any of several

department-store customers has exceeded the credit limit on a charge account. For each customer,

the following facts are available:

a) account number

b) balance at the beginning of the month

c) total of all items charged by the customer this month

d) total of all credits applied to the customer’s account this month

e) allowed credit limit.

The program should input all these facts as integers, calculate the new balance (= beginning balance

+ charges – credits), display the new balance and determine whether the new balance exceeds the

customer’s credit limit. For those customers whose credit limit is exceeded, the program should display

the message "Credit limit exceeded".

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4.19 (Sales Commission Calculator) A large company pays its salespeople on a commission basis.

The salespeople receive $200 per week plus 9% of their gross sales for that week. For example, a

salesperson who sells $5,000 worth of merchandise in a week receives $200 plus 9% of $5000, or a

total of $650. You’ve been supplied with a list of the items sold by each salesperson. The values of

these items are as follows:

Item Value

1 239.99

2 129.75

3 99.95

4 350.89

Develop a Java application that inputs one salesperson’s items sold for last week and calculates and

displays that salesperson’s earnings. There’s no limit to the number of items that can be sold.

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4.20 (Salary Calculator) Develop a Java application that determines the gross pay for each of

three employees. The company pays straight time for the first 40 hours worked by each employee

and time and a half for all hours worked in excess of 40. You’re given a list of the employees, their

number of hours worked last week and their hourly rates. Your program should input this information

for each employee, then determine and display the employee’s gross pay. Use class Scanner to

input the data.

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4.21 (Find the Largest Number) The process of finding the largest value is used frequently in computer

applications. For example, a program that determines the winner of a sales contest would input

the number of units sold by each salesperson. The salesperson who sells the most units wins the contest.

Write a pseudocode program, then a Java application that inputs a series of 10 integers and determines

and prints the largest integer. Your program should use at least the following three variables:

a) counter: A counter to count to 10 (i.e., to keep track of how many numbers have been

input and to determine when all 10 numbers have been processed).

b) number: The integer most recently input by the user.

c) largest: The largest number found so far.

 

4.22 (Tabular Output) Write a Java application that uses looping to print the following table of

values:

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4.23 (Find the Two Largest Numbers) Using an approach similar to that for Exercise 4.21, find

the two largest values of the 10 values entered. [Note: You may input each number only once.]

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4.24 (Validating User Input) Modify the program in Fig. 4.12 to validate its inputs. For any input,

if the value entered is other than 1 or 2, keep looping until the user enters a correct value.

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5.11 (Find the Smallest Value) Write an application that finds the smallest of several integers.
Assume that the first value read specifies the number of values to input from the user.

5.12 (Calculating the Product of Odd Integers) Write an application that calculates the product
of the odd integers from 1 to 15.

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5.13 (Factorials) Factorials are used frequently in probability problems. The factorial of a positive
integer n (written n! and pronounced “n factorial”) is equal to the product of the positive integers from
1 to n. Write an application that calculates the factorials of 1 through 20. Use type long. Display the
results in tabular format. What difficulty might prevent you from calculating the factorial of 100?

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5.13 method program: reversed number write a method that takes an integer value and returns the number

with its digits reversed. for example, given the number 7631, the method should return 1367. incorporate the

method into an application that reads a value from the user and displays the result output example: enter an

integer: 98 the original number is 98, and the reversed number 89. actnty 513.1: method program: reversed

number 0/4 main.java load default template..

1 import java.uti1.scanner; 3 public class nain ( 4public static void main(stringt) args) ( scanner scnr -new

scanner(system,in); / type your code here. ii invoke reversed )method and output the result based on user input

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5.14 (Modified Compound-Interest Program) Modify the compound-interest application of
Fig. 5.6 to repeat its steps for interest rates of 5%, 6%, 7%, 8%, 9% and 10%. Use a for loop to
vary the interest rate.

5.15 (Triangle Printing Program) Write an application that displays the following patterns separately,
one below the other. Use for loops to generate the patterns. All asterisks (*) should be printed
by a single statement of the form System.out.print('*'); which causes the asterisks to print side
by side. A statement of the form System.out.println(); can be used to move to the next line. A
statement of the form System.out.print(' '); can be used to display a space for the last two patterns.
There should be no other output statements in the program. [Hint: The last two patterns require
that each line begin with an appropriate number of blank spaces.]
(a) (b) (c) (d)
* ********** ********** *
** ********* ********* **
*** ******** ******** ***
**** ******* ******* ****
***** ****** ****** *****
****** ***** ***** ******
******* **** **** *******
******** *** *** ********
********* ** ** *********
********** * * **********
1 // Exercise 5.10: Printing.java
2 public class Printing
3 {
4 public static void main(String[] args)
5 {
6 for (int i = 1; i <= 10; i++)
7 {
8 for (int j = 1; j <= 5; j++)
9 System.out.print('@');
10
11 System.out.println();
12 }
13 }
14 } // end class Printing
Exercises 197
5.16 (Bar Chart Printing Program) One interesting application of computers is to display
graphs and bar charts. Write an application that reads five numbers between 1 and 30. For each
number that’s read, your program should display the same number of adjacent asterisks. For example,
if your program reads the number 7, it should display *******. Display the bars of asterisks after
you read all five numbers.

5.17 (Calculating Sales) An online retailer sells five products whose retail prices are as follows:
Product 1, $2.98; product 2, $4.50; product 3, $9.98; product 4, $4.49 and product 5, $6.87.
Write an application that reads a series of pairs of numbers as follows:
a) product number
b) quantity sold
Your program should use a switch statement to determine the retail price for each product. It
should calculate and display the total retail value of all products sold. Use a sentinel-controlled
loop to determine when the program should stop looping and display the final results.

5.18 (Modified Compound-Interest Program) Modify the application in Fig. 5.6 to use only integers
to calculate the compound interest. [Hint: Treat all monetary amounts as integral numbers
of pennies. Then break the result into its dollars and cents portions by using the division and remainder
operations, respectively. Insert a period between the dollars and the cents portions.]
5.19 Assume that i = 1, j = 2, k = 3 and m = 2. What does each of the following statements print?
a) System.out.println(i == 1);
b) System.out.println(j == 3);
c) System.out.println((i >= 1) && (j < 4));
d) System.out.println((m <= 99) & (k < m));
e) System.out.println((j >= i) || (k == m));
f) System.out.println((k + m < j) | (3 - j >= k));
g) System.out.println(!(k > m));

5.20 (Calculating the Value of π) Calculate the value of π from the infinite series
Print a table that shows the value of π approximated by computing the first 200,000 terms of this
series. How many terms do you have to use before you first get a value that begins with 3.14159?

5.21 (Pythagorean Triples) A right triangle can have sides whose lengths are all integers. The set
of three integer values for the lengths of the sides of a right triangle is called a Pythagorean triple.
The lengths of the three sides must satisfy the relationship that the sum of the squares of two of the
sides is equal to the square of the hypotenuse. Write an application that displays a table of the
Pythagorean triples for side1, side2 and the hypotenuse, all no larger than 500. Use a triple-nested
for loop that tries all possibilities. This method is an example of “brute-force” computing. You’ll
learn in more advanced computer science courses that for many interesting problems there’s no
known algorithmic approach other than using sheer brute force.

5.22 (Modified Triangle Printing Program) Modify Exercise 5.15 to combine your code from
the four separate triangles of asterisks such that all four patterns print side by side. [Hint: Make clever
use of nested for loops.]

5.23 (De Morgan’s Laws) In this chapter, we discussed the logical operators &&, &, ||, |, ^ and !.
De Morgan’s laws can sometimes make it more convenient for us to express a logical expression.
These laws state that the expression !(condition1 && condition2) is logically equivalent to the expression
(!condition1 || !condition2). Also, the expression !(condition1 || condition2) is logically
equivalent to the expression (!condition1 && !condition2). Use De Morgan’s laws to write equivalent
π 4
4
3
– -- 4
5
--
4
7
– -- 4
9
--
4
11
= + + – ----- +…
198 Chapter 5 Control Statements: Part 2; Logical Operators
expressions for each of the following, then write an application to show that both the original expression
and the new expression in each case produce the same value:
a) !(x < 5) && !(y >= 7)
b) !(a == b) || !(g != 5)
c) !((x <= 8) && (y > 4))
d) !((i > 4) || (j <= 6))

5.24 (Diamond Printing Program) Write an application that prints the following diamond
shape. You may use output statements that print a single asterisk (*), a single space or a single newline
character. Maximize your use of repetition (with nested for statements), and minimize the
number of output statements.

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5.25 (Modified Diamond Printing Program) Modify the application you wrote in Exercise 5.24
to read an odd number in the range 1 to 19 to specify the number of rows in the diamond. Your
program should then display a diamond of the appropriate size.

5.26 A criticism of the break statement and the continue statement is that each is unstructured.
Actually, these statements can always be replaced by structured statements, although doing so can
be awkward. Describe in general how you’d remove any break statement from a loop in a program
and replace it with some structured equivalent. [Hint: The break statement exits a loop from the
body of the loop. The other way to exit is by failing the loop-continuation test. Consider using in
the loop-continuation test a second test that indicates “early exit because of a ‘break’ condition.”]
Use the technique you develop here to remove the break statement from the application in
Fig. 5.13.

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Chapter - 6 Programming Assignment CIS-043-52219 

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6.20 (Circle Area) Write an application that prompts the user for the radius of a circle and uses
a method called circleArea to calculate the area of the circle.

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6.21 (Separating Digits) Write methods that accomplish each of the following tasks:
a) Calculate the integer part of the quotient when integer a is divided by integer b.
b) Calculate the integer remainder when integer a is divided by integer b.
Triangle Side 1 Side 2
1 3.0 4.0
2 5.0 12.0
3 8.0 15.0
Fig. 6.15 | Values for the sides of triangles in Exercise 6.15.
240 Chapter 6 Methods: A Deeper Look
c) Use the methods developed in parts (a) and (b) to write a method displayDigits that
receives an integer between 1 and 99999 and displays it as a sequence of digits, separating
each pair of digits by two spaces. For example, the integer 4562 should appear as
4 5 6 2
Incorporate the methods into an application that inputs an integer and calls display-
Digits by passing the method the integer entered. Display the results.
 

6.22 (Temperature Conversions) Implement the following integer methods:
a) Method celsius returns the Celsius equivalent of a Fahrenheit temperature, using the
calculation
celsius = 5.0 / 9.0 * (fahrenheit - 32);
b) Method fahrenheit returns the Fahrenheit equivalent of a Celsius temperature, using
the calculation
fahrenheit = 9.0 / 5.0 * celsius + 32;
c) Use the methods from parts (a) and (b) to write an application that enables the user either
to enter a Fahrenheit temperature and display the Celsius equivalent or to enter a
Celsius temperature and display the Fahrenheit equivalent.
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6.23 (Find the Minimum) Write a method minimum3 that returns the smallest of three floatingpoint
numbers. Use the Math.min method to implement minimum3. Incorporate the method into an
application that reads three values from the user, determines the smallest value and displays the result.
 

6.24 (Perfect Numbers) An integer number is said to be a perfect number if its factors, including
1 (but not the number itself), sum to the number. For example, 6 is a perfect number, because 6 =
1 + 2 + 3. Write a method isPerfect that determines whether parameter number is a perfect number.
Use this method in an application that displays all the perfect numbers between 1 and 1000. Display
the factors of each perfect number to confirm that the number is indeed perfect. Challenge the computing
power of your computer by testing numbers much larger than 1000. Display the results.
 

6.25 (Prime Numbers) A positive integer is prime if it’s divisible by only 1 and itself. For example,
2, 3, 5 and 7 are prime, but 4, 6, 8 and 9 are not. The number 1, by definition, is not prime.
a) Write a method that determines whether a number is prime.
b) Use this method in an application that determines and displays all the prime numbers
less than 10,000. How many numbers up to 10,000 do you have to test to ensure that
you’ve found all the primes?
c) Initially, you might think that n/2 is the upper limit for which you must test to see
whether a number n is prime, but you need only go as high as the square root of n. Rewrite
the program, and run it both ways.

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6.26 (Reversing Digits) Write a method that takes an integer value and returns the number with
its digits reversed. For example, given the number 7631, the method should return 1367. Incorporate
the method into an application that reads a value from the user and displays the result.

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6.27 (Greatest Common Divisor) The greatest common divisor (GCD) of two integers is the largest
integer that evenly divides each of the two numbers. Write a method gcd that returns the greatest
common divisor of two integers. [Hint: You might want to use Euclid’s algorithm. You can find
information about it at en.wikipedia.org/wiki/Euclidean_algorithm.] Incorporate the method
into an application that reads two values from the user and displays the result.

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Chapter - 7 Programming Assignment CIS-043-52219 

 

7.8 Write Java statements to accomplish each of the following tasks:
a) Display the value of element 6 of array f.
b) Initialize each of the five elements of one-dimensional integer array g to 8.
c) Total the 100 elements of floating-point array c.
d) Copy 11-element array a into the first portion of array b, which contains 34 elements.
e) Determine and display the smallest and largest values contained in 99-element floatingpoint
array w.

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7.10 (Sales Commissions) Use a one-dimensional array to solve the following problem: A company
pays its salespeople on a commission basis. The salespeople receive $200 per week plus 9% of
their gross sales for that week. For example, a salesperson who grosses $5,000 in sales in a week receives
$200 plus 9% of $5,000, or a total of $650. Write an application (using an array of counters)
that determines how many of the salespeople earned salaries in each of the following ranges (assume
that each salesperson’s salary is truncated to an integer amount):
a) $200–299
b) $300–399
c) $400–499
d) $500–599
e) $600–699
f) $700–799
g) $800–899
h) $900–999
i) $1,000 and over
Summarize the results in tabular format.

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7.12 (Duplicate Elimination) Use a one-dimensional array to solve the following problem:
Write an application that inputs five numbers, each between 10 and 100, inclusive. As each number
is read, display it only if it’s not a duplicate of a number already read. Provide for the “worst case,”
in which all five numbers are different. Use the smallest possible array to solve this problem. Display
the complete set of unique values input after the user enters each new value.

​

7.14 (Variable-Length Argument List) Write an application that calculates the product of a series
of integers that are passed to method product using a variable-length argument list. Test your method
with several calls, each with a different number of arguments.

​

7.15 (Command-Line Arguments) Rewrite Fig. 7.2 so that the size of the array is specified by the
first command-line argument. If no command-line argument is supplied, use 10 as the default size
of the array.

 

7.16 (Using the Enhanced for Statement) Write an application that uses an enhanced for statement
to sum the double values passed by the command-line arguments. [Hint: Use the static
method parseDouble of class Double to convert a String to a double value.]

 

7.17 (Dice Rolling) Write an application to simulate the rolling of two dice. The application
should use an object of class Random once to roll the first die and again to roll the second die. The
sum of the two values should then be calculated. Each die can show an integer value from 1 to 6, so
the sum of the values will vary from 2 to 12, with 7 being the most frequent sum, and 2 and 12 the
least frequent. Figure 7.28 shows the 36 possible combinations of the two dice. Your application 

should roll the dice 36,000,000 times. Use a one-dimensional array to tally the number of times
each possible sum appears. Display the results in tabular format.

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7.29 (Fibonacci Series) The Fibonacci series
0, 1, 1, 2, 3, 5, 8, 13, 21, …
begins with the terms 0 and 1 and has the property that each succeeding term is the sum of the two
preceding terms.
a) Write a method fibonacci(n) that calculates the nth Fibonacci number. Incorporate
this method into an application that enables the user to enter the value of n.
b) Determine the largest Fibonacci number that can be displayed on your system.
c) Modify the application you wrote in part (a) to use double instead of int to calculate
and return Fibonacci numbers, and use this modified application to repeat part (b).

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Chapter - 8 Programming Assignment CIS-043-52219 

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8.2 (Based on Section 8.14) Explain the notion of package access in Java. Explain the negative
aspects of package access.

8.3 What happens when a return type, even void, is specified for a constructor?

8.4 (Rectangle Class) Create a class Rectangle with attributes length and width, each of which
defaults to 1. Provide methods that calculate the rectangle’s perimeter and area. It has set and get
methods for both length and width. The set methods should verify that length and width are each
floating-point numbers larger than 0.0 and less than 20.0. Write a program to test class Rectangle.

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.
8.5 (Modifying the Internal Data Representation of a Class) It would be perfectly reasonable
for the Time2 class of Fig. 8.5 to represent the time internally as the number of seconds since midnight
rather than the three integer values hour, minute and second. Clients could use the same public
methods and get the same results. Modify the Time2 class of Fig. 8.5 to implement the time as
the number of seconds since midnight and show that no change is visible to the clients of the class.

8.6 (Savings Account Class) Create class SavingsAccount. Use a static variable annualInterestRate
to store the annual interest rate for all account holders. Each object of the class contains a
private instance variable savingsBalance indicating the amount the saver currently has on deposit.
Provide method calculateMonthlyInterest to calculate the monthly interest by multiplying the
savingsBalance by annualInterestRate divided by 12—this interest should be added to savings-
Balance. Provide a static method modifyInterestRate that sets the annualInterestRate to a new
value. Write a program to test class SavingsAccount. Instantiate two savingsAccount objects,
saver1 and saver2, with balances of $2000.00 and $3000.00, respectively. Set annualInterestRate
to 4%, then calculate the monthly interest for each of 12 months and print the new balances for
both savers. Next, set the annualInterestRate to 5%, calculate the next month’s interest and print
the new balances for both savers.

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8.7 (Enhancing Class Time2) Modify class Time2 of Fig. 8.5 to include a tick method that increments
the time stored in a Time2 object by one second. Provide method incrementMinute to increment
the minute by one and method incrementHour to increment the hour by one. Write a
program that tests the tick method, the incrementMinute method and the incrementHour method
to ensure that they work correctly. Be sure to test the following cases:
a) incrementing into the next minute,
b) incrementing into the next hour and
c) incrementing into the next day (i.e., 11:59:59 PM to 12:00:00 AM).

8.8 (Enhancing Class Date) Modify class Date of Fig. 8.7 to perform error checking on the initializer
values for instance variables month, day and year (currently it validates only the month and
day). Provide a method nextDay to increment the day by one. Write a program that tests method
nextDay in a loop that prints the date during each iteration to illustrate that the method works correctly.
Test the following cases:
a) incrementing into the next month and
b) incrementing into the next year.

8.9 Rewrite the code in Fig. 8.14 to use a separate import declaration for each static member
of class Math that’s used in the example.

8.10 Write an enum type TrafficLight, whose constants (RED, GREEN, YELLOW) take one parameter—
the duration of the light. Write a program to test the TrafficLight enum so that it displays the
enum constants and their durations.

8.11 (Complex Numbers) Create a class called Complex for performing arithmetic with complex
numbers. Complex numbers have the form
realPart + imaginaryPart * i
Write a program to test your class. Use floating-point variables to represent the private data of the
class. Provide a constructor that enables an object of this class to be initialized when it’s declared.
Provide a no-argument constructor with default values in case no initializers are provided. Provide
public methods that perform the following operations:
a) Add two Complex numbers: The real parts are added together and the imaginary parts
are added together.
b) Subtract two Complex numbers: The real part of the right operand is subtracted from
the real part of the left operand, and the imaginary part of the right operand is subtracted
from the imaginary part of the left operand.
c) Print Complex numbers in the form (realPart, imaginaryPart).

8.12 (Date and Time Class) Create class DateAndTime that combines the modified Time2 class of
Exercise 8.7 and the modified Date class of Exercise 8.8. Modify method incrementHour to call
method nextDay if the time is incremented into the next day. Modify methods toString and toUniversalString
to output the date in addition to the time. Write a program to test the new class DateAndTime.
Specifically, test incrementing the time to the next day.

8.13 (Set of Integers) Create class IntegerSet. Each IntegerSet object can hold integers in the
range 0–100. The set is represented by an array of booleans. Array element a[i] is true if integer i
is in the set. Array element a[j] is false if integer j is not in the set. The no-argument constructor
initializes the array to the “empty set” (i.e., all false values).
Provide the following methods: The static method union creates a set that’s the set-theoretic
union of two existing sets (i.e., an element of the new set’s array is set to true if that element is true
in either or both of the existing sets—otherwise, the new set’s element is set to false). The static
method intersection creates a set which is the set-theoretic intersection of two existing sets (i.e.,
an element of the new set’s array is set to false if that element is false in either or both of the
existing sets—otherwise, the new set’s element is set to true). Method insertElement inserts a new
integer k into a set (by setting a[k] to true). Method deleteElement deletes integer m (by setting
a[m] to false). Method toString returns a String containing a set as a list of numbers separated
by spaces. Include only those elements that are present in the set. Use --- to represent an empty
set. Method isEqualTo determines whether two sets are equal. Write a program to test class IntegerSet.
Instantiate several IntegerSet objects. Test that all your methods work properly.

8.14 (Date Class) Create class Date with the following capabilities:
a) Output the date in multiple formats, such as
MM/DD/YYYY
June 14, 1992
DDD YYYY
b) Use overloaded constructors to create Date objects initialized with dates of the formats
in part (a). In the first case the constructor should receive three integer values. In the
second case it should receive a String and two integer values. In the third case it should
receive two integer values, the first of which represents the day number in the year.
[Hint: To convert the String representation of the month to a numeric value, compare
Strings using the equals method. For example, if s1 and s2 are Strings, the method
call s1.equals(s2) returns true if the Strings are identical and otherwise returns
false.]

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Solution available with code EES

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Modeling and Investigation of Refrigeration System
Performance with Two-Phase Fluid Injection in a
Scroll Compressor Mechanical Engineering EES

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