题解

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