Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 5.33PE
(Perfect number) A positive integer is called a perfect number if it is equal to the sum of all of its positive divisors, excluding itself. For example, 6 is the first perfect number because 6 = 3 + 2 + 1. The next is 28 = 14 + 7 + 4 + 2 + 1. There are four pe1fect numbers < 10,000. Write a
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(Display Magic Numbers) Display the first N magic numbers, where N is a positive number that the user provides as input. Here, a magic number is a number whose sum of its digits eventually leads to 1. For example, 1234 is a magic number because 1 + 2 + 3 + 4 = 10 and 1 + 0 = 1, while 1235 is not (1 + 2 + 3 + 5 = 11 and 1 + 1 = 2). Write a program that prints out the first N magic numbers, seven on each line.
Here is the sample output:
You are required to use the following function prototype:
bool isMagic(int value); // Returns true if value is a magic number
The outline of this function will be as follows:
Step 1: Calculate the sum of digits of value
Step 2: Repeat Step 1 until we get a single digit
Step 3: If the resulting sum is equal to 1 then it is a magic number, otherwise not
(Display Magic Numbers) Display the first N magic numbers, where N is a positive number that the user provides as input.
Here, a magic number is a number whose sum of its digits eventually leads to 1. For example, 1234 is a magic number
because 1+2+3+4 = 10 and 1 +0 = 1, while 1235 is not (1 +2+ 3 +5 = 11 and 1 +1 = 2). Write a program that prints out
the first N magic numbers, seven on each line.
Here is the sample output:
Enter a positive integer number: 30
1
10
19
28
37
46
55
64
73
82
91
100
109
118
127
136
145
154
163
172
181
190
199
208
217
226
235
244
253
262
You are required to use the following function prototype:
bool isMagic(int value); // Returns true if value is a magic number
The outline of this function will be as follows:
Step 1: Calculate the sum of digits of value
Step 2: Repeat Step 1 until we get a single digit
Step 3: If the resulting sum is equal to 1 then it is a magic number, otherwise not
(Find future dates) Write a program that prompts the user to enter an
integer for today’s day of the week (Sunday is 0, Monday is 1, …, and Saturday is
6). Also prompt the user to enter the number of days after today for a future day
and display the future day of the week.
Chapter 5 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 5.2 - Prob. 5.2.1CPCh. 5.2 - How many times are the following loop bodies...Ch. 5.2 - Prob. 5.2.3CPCh. 5.3 - What is wrong if guess is initialized to 0 in line...Ch. 5.4 - Revise the code using the System. nanoTime () to...Ch. 5.5 - Prob. 5.5.1CPCh. 5.6 - Prob. 5.6.1CPCh. 5.6 - What are the differences between a while loop and...Ch. 5.7 - Do the following two loops result in the same...Ch. 5.7 - What are the three parts of a for loop control?...
Ch. 5.7 - Suppose the input is 2 3 4 5 0. What is the output...Ch. 5.7 - What does the following statement do? for ( ; ; )...Ch. 5.7 - If a variable is declared in a for loop control,...Ch. 5.7 - Convert the following for loop statement to a...Ch. 5.7 - Count the number of iterations in the following...Ch. 5.8 - Can you convert a for loop to a while loop? List...Ch. 5.8 - Can you always convert a while loop into a for...Ch. 5.8 - Identify and fix the errors in the following code:...Ch. 5.8 - Prob. 5.8.4CPCh. 5.9 - How many times is the println statement executed?...Ch. 5.9 - Show the output of the following programs. (Hint:...Ch. 5.11 - Will the program work if n1 and n2 are replaced by...Ch. 5.11 - In Listing 5.11. why is it wrong if you change the...Ch. 5.11 - In Listing 5. 11, how many times the loop body is...Ch. 5.11 - Prob. 5.11.4CPCh. 5.11 - Prob. 5.11.5CPCh. 5.12 - What is the keyword break for? What is the keyword...Ch. 5.12 - The for loop on the left is converted into the...Ch. 5.12 - Rewrite the programs TestBreak and TestContinue in...Ch. 5.12 - After the break statement in (a) is executed in...Ch. 5.13 - What happens to the program if (low high) in line...Ch. 5.14 - Simply the code in lined 27-32 using a conditional...Ch. 5 - (Count positive and negative numbers and compute...Ch. 5 - (Repeat additions) Listing 5.4,...Ch. 5 - (Conversion from kilograms to pounds) Write a...Ch. 5 - (Conversion from miles to kilometers) Write a...Ch. 5 - (Conversion from kilograms to pounds and pounds to...Ch. 5 - Prob. 5.6PECh. 5 - (Financial application: compute future tuition)...Ch. 5 - (Find the highest score) Write a program that...Ch. 5 - (Find the two highest scores) Write a program that...Ch. 5 - (Find numbers divisible by 5 and 6) Write a...Ch. 5 - (Find numbers divisible by 5 or 6, but not both)...Ch. 5 - (Find the smallest n such that n2 12,000) Use a...Ch. 5 - (Find the largest n such that n3 12,000) Use a...Ch. 5 - (Compute the greatest common divisor) Another...Ch. 5 - (Display the ASCII character table) Write a...Ch. 5 - (Find the factors of an integer) Write a program...Ch. 5 - (Display pyramid) Write a program that prompts the...Ch. 5 - (Display four patterns using Loops) Use nested...Ch. 5 - (Display numbers in a pyramid pattern) Write a...Ch. 5 - (Display prime numbers between 2 and 1,000) Modify...Ch. 5 - Prob. 5.21PECh. 5 - For the formula to compute monthly payment, see...Ch. 5 - (Demonstrate cancellation errors) A cancellation...Ch. 5 - Prob. 5.24PECh. 5 - (Compute ) You can approximate by using the...Ch. 5 - (Compute e) You can approximate e using the...Ch. 5 - (Display leap years) Write a program that displays...Ch. 5 - (Display the first days of each month) Write a...Ch. 5 - (Display calendars) Write a program that prompts...Ch. 5 - (Financial application: compound value) Suppose...Ch. 5 - (Financial application: compute CD value) Suppose...Ch. 5 - (Game: lottery) Revise Listing 3.8, Lottery.java,...Ch. 5 - (Perfect number) A positive integer is called a...Ch. 5 - (Game: scissor; rock, paper) Programming Exercise...Ch. 5 - (Summation) Write a program to compute the...Ch. 5 - (Business application: checking ISBN) Use loops to...Ch. 5 - (Decimal to binary) Write a program that prompts...Ch. 5 - (Decimal to octal) Write a program that prompts...Ch. 5 - (Financial application: find the sales amount) You...Ch. 5 - (Simulation: heads or tails) Write a program that...Ch. 5 - (Occurrence of max numbers) Write a program that...Ch. 5 - (Financial application: find the sales amount)...Ch. 5 - (Math: combinations) Write a program that displays...Ch. 5 - (Computer architecture: bit-level operations) A...Ch. 5 - (Statistics: compute mean and standard deviation)...Ch. 5 - (Reverse a string) Write a program that prompts...Ch. 5 - (Business: check ISBN-13) ISBN -13 is a new...Ch. 5 - (Process string) Write a program that prompts the...Ch. 5 - (Count vowels and consonants) Assume that the...Ch. 5 - Prob. 5.50PECh. 5 - (Longest common prefix) Write a program that...
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