Introduction to Java Programming and Data Structures Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134700144
Author: Liang
Publisher: PEARSON
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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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4388576018402626
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→ 4 * 2 = 8
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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
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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