To find the real error, it might be useful to print the value of ratio, which turns out to be 0.

要找到真正的错误，就要输出一下ratio的值来看一下，结果发现是0了。

youdao

To find the real error, it might be useful to print the value of ratio, which turns out to be 0.

要找到真正的错误，就要输出一下ratio的值来看一下，结果发现是0了。

youdao