题解

#include<bits/stdc++.h>
using namespace std;
    
int main()
{
    int a,b,d;
    char c;
    cin>>a>>b>>c;
    if(c == '/' || c=='+' || c=='*' || c=='-'){
        a=a+0;
    }else{
        cout<<"Invalid operator!";
    }if(c=='+'){
        cout<<a+b<<endl;
    }if(c=='-'){
        cout<<a-b<<endl;
    }if(c=='*'){
        cout<<a*b<<endl;
    }if(c=='/'){
        b==0?cout<<"Divided by zero!":cout<<a/b;
    }
    return 0;
}