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Source Code
Language
#include <stdio.h>
#include <string.h>
int main()
{
unsigned char message[100], original[100], ch;
int i, key, len;
memset(message, 0, 100);
memset(original, 0, 100);
printf("Enter a message to encrypt: ");
scanf("%s", original);
printf("Enter key: ");
scanf("%d", &key);
for(i = 0, len = strlen(original); i < len; i++){
if(original[i] >= 'a' && original[i] <= 'z'){
if(i > 0 && memchr("aeiou", original[i-1], 5)){
message[i] = original[i] + 14;
}else{
message[i] = original[i] + 13;
}
}
}
for(i = 0, len = strlen(message); i < len; i++){
if(message[i] > 'z'){
message[i] = message[i] - 'z' + 'a' - 1;
}
}
printf("Encrypted message: %s", message);
return 0;
}
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