#include <cs50.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>

int main(int argc, string argv[])

{
      char * key = argv[1];
      char n;
    if (argc != 2)
    {
       printf ("./caesar key\n");
        return 1;
    }
    for (int i = 0; n = strlen (key), i < n; i++)
    {
     if isdigit (key[i])
     {
         int k = atoi(key[i]);
         printf("%i\n", k);
     }
        else printf("./caesar key\n");
        return 1;
    }
    printf ("\n");

}