#include <stdio.h>

#define SIZE	80
#define TRUE	1
#define FALSE	0

int main() {
	char v[SIZE], c;
	int as, i, lon, trobat;

	printf("Intro seq de chars: ");
	i = 0;
	do {
		scanf("%c", &c);
		v[i] = c;
		i++;
	} while (c != '\n');
	lon = i;
	i = 0;
	trobat = FALSE;
	while (i < lon - 1 && !trobat) {
		if (v[i] == 'a') {
			trobat = TRUE;
		}
		i++;
	}
	if (trobat) {
		printf("Primera a a la pos: %d\n", i-1);
	} else {
		printf("No hi han 'a's\n");
	}
}