@[zhjzhmh](/user/233815) 这里:
```cpp
if(js==2)
{
if(x==1) pr(s3+s2);
if(x==2) pr(s1-s2);
if(x==3) pr(s1-s2);
}
```
把
```cpp
if(x==2) pr(s1-s2);
```
改成:
```cpp
if(x==2) pr(s1-s3);
```
试试?
by Eason_AC @ 2020-10-08 07:49:10
谢谢
by zhjzhmh @ 2020-10-08 07:50:47