12404 - 简单计算器

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