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;
}