```
if(ch=='-')
flag=-1,ch=getchar();
```
这个getchar是不是得放到if外面？
@[dongyc0301](/user/540615)
by ZBAA_MKC @ 2022-08-08 22:17:34
写错了：
```cpp
while(ch<'0'||ch>'9'){if(ch=='-'){flag=-1;}ch=getchar();}
```
by yukimianyan @ 2022-08-08 22:17:38
@[MKCAKIOI](/user/228770)
哦哦谢谢大佬
by dongyc0301 @ 2022-08-08 22:20:24
@[yukimianyan](/user/509229) okok谢谢
by dongyc0301 @ 2022-08-08 22:20:42