/* Caesar cipher
 * By Feky */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char *argv[]){

int i=0, n, pos;

if(argc != 3){
  printf("Usage: %s [string] [shift]\n", argv[0]);
  return 1;
}
n = atoi(argv[2]);
while (argv[1][i] != '\0')
 {
  pos = argv[1][i];
   if(isupper(pos)){
       pos+=n;
       if(pos > 'Z') pos-=26;
   }
   if(islower(pos)){
       pos+=n;
       if(pos > 'z') pos-=26;
   }
 printf("%c", pos);
 i++;
}
printf("\n");
return 0;
}