Question

Needs to be written in C:

Write a Caesar Cipher that decrypts a message from ' ' (Space, ASCII 32) to '~' (tilde, ASCII 126).

Answer 1

#include<stdio.h>

char decrypt(char cipher, int key) {
   char res = cipher + key;
   return res;
}

int main() {
   char input = ' ';
   int key = 94;
   
   char plain = decrypt(input, key);

   printf("Plain message: %c\n", plain);

   return 0;
}