1.4-19:简单计算器

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