```cpp
#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,a,b,c;
char last,s[20],ans[20];
scanf("%d\n",&n);
while(n--)
{
fgets(s,sizeof(s),stdin);
if(s[0]=='a'||s[0]=='b'||s[0]=='c')
last=s[0],s[0]=' ';
sscanf(s,"%d %d",&a,&b);
switch(last)
{
case 'a': c=a+b;sprintf(ans,"%d+%d=%d",a,b,c);break;
case 'b': c=a-b;sprintf(ans,"%d-%d=%d",a,b,c);break;
case 'c': c=a*b;sprintf(ans,"%d*%d=%d",a,b,c);break;
}
printf("%s\n%d\n",ans,strlen(ans));
}
}
```
by 违规用户名971024 @ 2024-02-26 17:51:12
不用那么麻烦，看看我的代码。
by 违规用户名971024 @ 2024-02-26 17:51:43
给个关注呗
by 违规用户名971024 @ 2024-02-26 17:52:48
@[yzy0323](/user/736644)
by 违规用户名971024 @ 2024-02-26 17:53:11
@[feizhukkksc03](/user/971024) ok已关
by yzy0323 @ 2024-02-26 21:01:48
@[feizhukkksc03](/user/971024) 还是想知道问题出在哪
by yzy0323 @ 2024-02-26 21:02:21
@[yzy0323](/user/736644)
```cpp
cin >> ch;
这行有问题
by cpp_xhq @ 2024-03-16 09:27:15
@[cpp_xhq](/user/1233382) 请问是怎样的运行问题呢？我在自己IDE测的数据是没问题的
by yzy0323 @ 2024-03-16 09:40:34
@[yzy0323](/user/736644)
我没理解您什什么意思 能讲一下思路吗
by cpp_xhq @ 2024-03-16 09:47:40
@[yzy0323](/user/736644)
我的思路是先读取次数
在循环读取第一个数或字母
如果他是字母就继续输入
如果他是数字把字符串数字转换成int
by cpp_xhq @ 2024-03-16 09:53:33