c语言-for循环的使用技巧

void *(memset)(void *s, int c, size_t n)
{
    const unsigned char uc = c;
    unsigned char *su;
    for (su = s; 0 < n; ++su, --n)
        *su = uc;
    return (s);
}

++和--的配合，值得学习。