题解

include<iostream>
using namespace std;
int us(int a,int b,char c){
if(c=='+'){
return a+b;
}else if(c=='-'){
return a-b;
}else if(c==''){
return ab;
}else if(c=='/'){
return a/b;
}else{
return a%b;
}
}
int main(){
int a,b;
char c;
cin>>a >> c >>b;
cout << us(a,b,c);
return 0;
}