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

int f(int t[], int len, int x) {
    int count = 0;
    while (len >= 0) {
        count += t[len] == x;
        len--;
    }
    return count;
}

int main() {
    int t[8] = {3, 6, 7, 6, 9, 9, 5, 9};
    printf("nombre de 9 : %d\n", f(t, 8, 9));
}