#include <stddef.h>
#include <stdio.h>

#define N 6

size_t result;

size_t factorial(size_t n)
{
    if (n>1) {
        return n*factorial(n-1);
    } else {
        return 1;
    }
}

int main()
{
    result = factorial(N);

    printf("result = %zu\n", result);
    printf("sizeof(result) = %zu\n", sizeof(result));
    printf("&result = %zu\n", (size_t) &result);

    return 0;
}