#include <stdio.h>

int main(void) {
    int datos[] = {6, 8, 10, 4};
    size_t n = sizeof datos / sizeof datos[0];
    int suma = 0;
    for (size_t i = 0; i < n; i++) {
        suma += datos[i];
    }
    printf("Cantidad: %zu\n", n);
    printf("Promedio: %.2f\n", (double)suma / n);
    return 0;
}