Console Calculator

#include <iostream>
#include <string>

using namespace std;

int main()
{
    cout << "#### Welcome to calc ####" << endl;

    cout << "Enter first number" << endl;

    int num1;
    cin >> num1;

    string op;
    cout << "Enter operator (+, -, *, /)" << endl;
    cin >> op;

    int num2;
    cout << "Enter second number" << endl;
    cin >> num2;

    if(op == "+"){
            cout << "Answer is: " << num1 + num2 << endl;
        }else if (op == "-"){
                cout << "Answer is: " << num1 - num2 << endl;
            }else if (op == "*"){
                    cout << "Answer is: " << num1 * num2 << endl;
                }else if (op == "/"){
                    cout << "Answer is: " << (num1/num2) << endl;
                }else{
                        cout << "Invalid" << endl;
                    }
}