please help me out. A simple substitution cipher can be created by shifting a le
ID: 3799756 • Letter: P
Question
please help me out.
A simple substitution cipher can be created by shifting a letter n positions in alphabetic order. For example, if the possible characters are the list [A…Za…z], a shift of three would translate A to D and Z to c. The shift is circular so z would shift around to C. The shift value, n, can be positive or negative.
Write c/c++ program that performs this simple substitution cipher. Your c/c++ program should request the user to enter a shift value, followed by one alphabetic character. It should then print the cipher text for that character. Print an appropriate error message if the user enters something other than a letter from the list [A…Za…z].
Explanation / Answer
#include <stdio.h>
int main()
{
char c;
int a,s;
printf("Enter the plaintext character: ");
scanf("%c", &c);
printf("Enter the shift: ");
scanf("%d", &s);
a = ((c+s)-97)%26 + 97;
printf("Ciphertext: %c ",a);
}
//----------------------------------------------------------------------------------------------
sh-4.2$ main
Enter the plaintext character: a
Enter the shift: 4
Ciphertext: e
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.