c++ calculator script

#include <iostream>

using namespace std;

int main()
{
cout << "Welcome to the Calculator, write :cancel: to cancel the calculator\n";
 string cancel;

 while(cancel != "cancel")
 {
     int number1 = 0;
     int number2 = 0;
     string op;

     cout << "please enter your first number!\n";

     cin >> number1;

     cout << "please enter your second number!\n";

     cin >> number2; 

     cout << "please enter a operator!\n";
     cout << "( *, / , + , - )";

     cin >> op;
    
    if(op == "*")
    {
        number1 = number1 * number2;
        cout << number1; 
        number1 = 0;
        number2 = 0;
    }

    if(op == "/")
    {
        number1 = number1 / number2;
        cout << number1;
        number1 = 0;
        number2 = 0;
    }

    if(op == "+")
    {
        number1 = number1 + number2; 
        cout << number1;
        number1 = 0;
        number2 = 0;
    }

    if(op == "-")
    {
        number1 = number1 - number2;
        cout << number1; 
        number1 = 0; 
        number2 = 0;
    }
    
    cout << "Write cancel to cancel\n";
    cout << "write continue to resume with the calculator!\n";
    
    cin >> cancel;

 }
  
  
}
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