#include <stdio.h>

int age(int n)
{
    int f = 0;
    printf("age(%d): the address of f is %lu\n", n, &f);
    if (n == 1)
        f = 10;
    else
        f = age(n - 1) + 2;
    return f;
}

int main(void)
{
    int ret = age(5);
    printf("age(5) = %d\n", ret);
    return 0;
}