`s.find("\\n\\r")` $\to$ `s.find("\\r\\n")`。
by 囧仙 @ 2021-09-23 17:28:50
@[囧仙](/user/330759) 感谢
by RainSpark @ 2021-09-23 17:38:23
这个！
by zhangzhirui12345 @ 2021-09-24 19:04:20
```cpp
#include<bits/stdc++.h>
using namespace std;
string a;
int main(){
getline(cin,a);
for(int i=0;i<a.length();i++){
if(a[i]=='\\' and a[i+1]=='r' and a[i+2]=='\\' and a[i+3]=='n'){
cout<<"windows"<<endl;
break;
}else if(a[i]=='\\' and a[i+1]=='r'){
cout<<"mac"<<endl;
break;
}else if(a[i]=='\\' and a[i+1]=='n'){
cout<<"linux"<<endl;
break;
}
}
return 0;
}
```
by zhangzhirui12345 @ 2021-09-24 19:05:26