Programming

#include <stdio.h>
#include <ctype.h> /* for tolower function */

int main (void)
{
    char *word = "HolA";

   /* ignore the mechanism to bring the exercise to pass, it could be any loop */
    while (*word) {
        if (tolower(*word) == 'a') { /* here's the working bit */
            printf("Found an '%c'\n", *word);
        }
        ++word;
    }
    return 0;
}