#include <stdio.h>

int main() {
    int a = 1, b, c, d = 5;
    while(a <= d) {
        b = 1;
        c = 1;
    }
    while(c <= a) {
        b = b * c;
        c = c + 1;
    }
    printf("%d! = %d\n", a, b);
    a = a + 1;
}