C++ How To Program Sve & Mpl W/pe Etx A/c
1st Edition
ISBN: 9780134612386
Author: Deitel
Publisher: Pearson Education
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Textbook Question
Chapter 21, Problem 21.7E
(Simple Encryption) Some information on the Internet may he encrypted with a simple
- Write a
program that encrypts a message using rot 13. - Write a program that decrypts the scrambled message using 13 as the key.
- After writing the programs of part (a) and part (b), briefly answer the following question: If you did not know the key for part (b), how difficult do you think it would be to break the code? What if you had access to substantial computing power (e.g., supercomputers)? In Exercise 21.24 we ask you to write a program to accomplish this.
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(a) Is there an integer n such that n has ____________ ?
(b) Does there exist ___________ such that if n is divided by 4 the remainder is 1 and if ___________?
Chapter 21 Solutions
C++ How To Program Sve & Mpl W/pe Etx A/c
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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