C语言程序每一行意思讲解和结果

Question

Answer 1

main()
{
    int i, s, p;
    s = 10; /* first month */
    for (i=2; i<=6; i++)
    {
        p = f(s);   /* output of 2 ~ 6 */
        s += p;
    }
...
}

int f(int a)
{
    /* the output of this month, a is the output last month */
    return (a-2)*2;
}