```
scanf("%c",&op);
```
会读入回车。
by yqyx @ 2022-08-03 19:39:01
@[XHZS_XY](/user/467107) 切记，读入字符时要
```cpp
scanf(" %c",&op);
^
```
这个空格千万不能少！！！
by xieyikai2333 @ 2022-08-03 19:48:00
@[xieyikai2333](/user/380019) 谢谢各位dalao
by Cap1taL @ 2022-08-03 21:18:13