C++ How to Program (10th Edition)
10th Edition
ISBN: 9780134448237
Author: Paul J. Deitel, Harvey Deitel
Publisher: PEARSON
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Chapter 21, Problem 21.19E
(Erasing Characters from a string) Write a
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Q5. (Find the second lowest interger number) Write a program that prompts the user to enter
a set of integer numbers, and finally displays the second lowest integer number in the set. To
exit from the program enter -1.
Here is a sample run
Enter a set of integer numbers: 3 57
928-1 The second lowest number is
3.
(Financial: credit card number validation) Credit card numbers follow certain pat-
terns. A credit card number must have between 13 and 16 digits. It must start with:
4 for Visa cards
5 for Master cards
37 for American Express cards
6 for Discover cards
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
(Yes/No): Must string literals be enclosed in single quotes?
Chapter 21 Solutions
C++ How to Program (10th Edition)
Ch. 21 - Prob. 21.4ECh. 21 - Prob. 21.5ECh. 21 - (Find Code Error) Find any errors in the following...Ch. 21 - (Simple Encryption) Some information on the...Ch. 21 - Prob. 21.8ECh. 21 - Prob. 21.9ECh. 21 - (String Concatenation) Write a program that...Ch. 21 - (Hangman Game) Write a program that plays the game...Ch. 21 - (Printing a string Backward) Write a program that...Ch. 21 - (Alphabetizing Animal Names) Write a program that...
Ch. 21 - Prob. 21.14ECh. 21 - Prob. 21.15ECh. 21 - Prob. 21.16ECh. 21 - Prob. 21.17ECh. 21 - Prob. 21.18ECh. 21 - (Erasing Characters from a string) Write a program...Ch. 21 - Prob. 21.20ECh. 21 - Prob. 21.21ECh. 21 - Prob. 21.22ECh. 21 - Prob. 21.23ECh. 21 - Prob. 21.24ECh. 21 - Prob. 21.25ECh. 21 - (Cooking with Healthier Ingredients) Obesity in...Ch. 21 - Prob. 21.27MADCh. 21 - (SMS Language) Short Message Service (SMS) is a...
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