1 #include<iostream> 2 using namespace std; 3 int main(){ 4     int a,b; 5     char s; 6     while(cin>>a){ 7         cin>>s>>b; 8         if(s==‘+‘) 9             cout<<a+b<<endl;10         else if(s==‘-‘)11             cout<<a-b<<endl;12         else if(s==‘*‘)13             cout<<a*b<<endl;14         else if(s==‘/‘)15             cout<<a/b<<endl;16         else if(s==‘%‘)17             cout<<a%b<<endl;18         else19             cout<<"ERROR"<<endl;20     }21     return 0;22 }