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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Chapter 1, Problem 1.7PE
(Approximate π) π can be computed using the following formula:
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(Financial: credit card number validation) Credit card numbers follow certain pat-
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4 for Visa cards
5 for Master cards
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In 1954, Hans Luhn of IBM proposed an algorithm for validating credit card
numbers. The algorithm is useful to determine whether a card number is entered
correctly or whether a credit card is scanned correctly by a scanner. Credit card
numbers are generated following this validity check, commonly known as the
Luhn check or the Mod 10 check, which can be described as follows (for illustra-
tion, consider the card number 4388576018402626):
1. Double every second digit from right to left. If doubling of a digit results in a
two-digit number, add up the two digits to get a single-digit number.
4388576018402626
→ 2 * 2 = 4
→ 2 * 2 = 4
→ 4 * 2 = 8
→ 1 * 2 = 2
6 * 2 = 12 (1+ 2 = 3)
→ 5 * 2 = 10 (1+ 0 = 1)
→ 8 * 2 = 16 (1 + 6 = 7)
→ 4 * 2 = 8
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Chapter 1 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 1.2 - What are hardware and software?Ch. 1.2 - List the five major hardware components of a...Ch. 1.2 - What does the acronym CPU stand for? What unit is...Ch. 1.2 - Prob. 1.2.4CPCh. 1.2 - What is memory for? What does RAM stand for? Why...Ch. 1.2 - Prob. 1.2.6CPCh. 1.2 - Prob. 1.2.7CPCh. 1.3 - What language does the CPU understand?Ch. 1.3 - What is an assembly language? What is an...Ch. 1.3 - What is a high-level programming language? What is...
Ch. 1.3 - What is an interpreter? What is a compiler?Ch. 1.3 - Prob. 1.3.5CPCh. 1.4 - Prob. 1.4.1CPCh. 1.4 - Prob. 1.4.2CPCh. 1.4 - Prob. 1.4.3CPCh. 1.5 - Who invented Java? Which company owns Java now?Ch. 1.5 - What is a Java applet?Ch. 1.5 - What programming language does Android use?Ch. 1.6 - What is the Java language specification?Ch. 1.6 - Prob. 1.6.2CPCh. 1.6 - Prob. 1.6.3CPCh. 1.6 - Are tools like NetBeans and Eclipse different...Ch. 1.7 - What is a keyword? List some Java keywords.Ch. 1.7 - Prob. 1.7.2CPCh. 1.7 - Prob. 1.7.3CPCh. 1.7 - Prob. 1.7.4CPCh. 1.7 - Prob. 1.7.5CPCh. 1.8 - What is the Java source filename extension, and...Ch. 1.8 - What are the input and output of a Java compiler?Ch. 1.8 - What is the command to compile a Java program?Ch. 1.8 - What is the command to run a Java program?Ch. 1.8 - Prob. 1.8.5CPCh. 1.8 - Prob. 1.8.6CPCh. 1.8 - If a NoClassDefFoundError occurs when you run a...Ch. 1.8 - If a NoSuchMethodError occurs when you run a...Ch. 1.9 - Reformat the following program according to the...Ch. 1.10 - Prob. 1.10.1CPCh. 1.10 - Prob. 1.10.2CPCh. 1.10 - If you forget to put a closing quotation mark on a...Ch. 1.10 - If your program needs to read integers, but the...Ch. 1.10 - Suppose you write a program for computing the...Ch. 1.10 - Identify and fix the errors in the following code:...Ch. 1 - (Display three messages) Write a program that...Ch. 1 - (Display five messages) Write a program that...Ch. 1 - (Display a pattern) Write a program that displays...Ch. 1 - Prob. 1.4PECh. 1 - (Compute expressions) Write a program that...Ch. 1 - (Summation of a series) Write a program that...Ch. 1 - (Approximate ) can be computed using the...Ch. 1 - (Area and perimeter of a circle) Write a program...Ch. 1 - (Area and perimeter of a rectangle) Write a...Ch. 1 - (Average speed in miles) Assume that a runner runs...Ch. 1 - (Population projection) The U.S. Census Bureau...Ch. 1 - (Average speed in kilometers) Assume that a runner...Ch. 1 - (Algebra: solve 2 2 linear equations) You can use...
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