We are not able to push back EOF. But when we've reached the end of the file, we can push back a character.

我们不能推回一个EOF，但是当我们到达文件的结尾时，我们可以推回一个字符。

youdao

We are not able to push back EOF. But when we've reached the end of the file, we can push back a character.

我们不能推回一个EOF，但是当我们到达文件的结尾时，我们可以推回一个字符。

youdao