// Una constante global: todas las funciones la ven y ninguna la puede cambiar.
#include <stdio.h>

#define MAX_STUDENTS 4

const int PASSING_GRADE = 11;

int is_passing(int grade) {
    return grade >= PASSING_GRADE;
}

int count_passing(const int grades[], int n) {
    int count = 0;
    for (int i = 0; i < n; i++) {
        if (is_passing(grades[i])) {
            count = count + 1;
        }
    }
    return count;
}

int main(void) {
    int grades[MAX_STUDENTS] = {14, 9, 11, 7};

    printf("Aprobados: %d de %d\n", count_passing(grades, MAX_STUDENTS), MAX_STUDENTS);
    return 0;
}