Introduction to Programming with C++
3rd Edition
ISBN: 9780133252811
Author: Y. Daniel Liang
Publisher: Prentice Hall
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Chapter 4, Problem 8PE
(Find the character of an ASCII code) Write a
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(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
6.
(Geometry: area of a pentagon) The area of a pentagon can be computed using the
following formula (s is the length of a side):
Area
5x s²
4 X tan
TT
5
Write a program that prompts the user to enter the side of a pentagon and displays
the area. Here is a sample run:
Enter the side: 5.5 Enter
The area of the pentagon is 53.04444136781625
Complete the code as below mentioned.
Write all
Chapter 4 Solutions
Introduction to Programming with C++
Ch. 4 - Prob. 1CPCh. 4 - Prob. 2CPCh. 4 - Write a statement that converts 47 degrees to...Ch. 4 - Write a statement that converts /7 to an angle in...Ch. 4 - Use console print statements to determine the...Ch. 4 - Prob. 6CPCh. 4 - How do you display the characters \ and "?Ch. 4 - Show the printout of the following code:...Ch. 4 - Prob. 9CPCh. 4 - Prob. 10CP
Ch. 4 - If the input for a starting character and an...Ch. 4 - If you run Listing 4.4 GuessBirthday.cpp with...Ch. 4 - Which function do you use to test whether a...Ch. 4 - Which function do you use to convert a letter to...Ch. 4 - Prob. 15CPCh. 4 - Prob. 16CPCh. 4 - Prob. 17CPCh. 4 - Prob. 18CPCh. 4 - Write a statement that changes the first character...Ch. 4 - Show the output of the following code:...Ch. 4 - Prob. 21CPCh. 4 - To use stream manipulators, which header file must...Ch. 4 - Show the output of the following statements....Ch. 4 - Show the output of the following statements:...Ch. 4 - Show the output of the following statements;...Ch. 4 - Show the output of the following statements:...Ch. 4 - Prob. 27CPCh. 4 - How do you create an object for reading data from...Ch. 4 - Prob. 29CPCh. 4 - What happens if the file already exists when you...Ch. 4 - (Geometry: area of a pentagon) Write a program...Ch. 4 - (Geometry: great circle distance) The great circle...Ch. 4 - (Geography: estimate areas) Find the GPS locations...Ch. 4 - (Geometry: area of a hexagon) The area of a...Ch. 4 - Prob. 5PECh. 4 - (Random point on a circle) Write a program that...Ch. 4 - Prob. 7PECh. 4 - (Find the character of an ASCII code) Write a...Ch. 4 - Prob. 9PECh. 4 - (Vowel or consonant?) Assume letters...Ch. 4 - Prob. 11PECh. 4 - (Convert letter grade to number) Write a program...Ch. 4 - (Hex to binary) Write a program that prompts the...Ch. 4 - Prob. 14PECh. 4 - (Phone key pads) The international standard...Ch. 4 - Prob. 16PECh. 4 - Prob. 17PECh. 4 - Prob. 18PECh. 4 - (Order three cities) Write a program that prompts...Ch. 4 - Prob. 20PECh. 4 - (Student major and status) Write a program that...Ch. 4 - Prob. 22PECh. 4 - (Check SSN) Write a program that prompts the user...
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