C 类库 大家看看 也许在不知道这个函数原理的时候可能有用 C 类库 大家看看 也许在不知道这个函数原理的时候可能有用-C library to see if perhaps we do not know if this function may be useful when the principle of C library to see if perhaps we do not know if this function may be useful when the principle o