un programa de una calculadora

#include <iostream>

using namespace std;

int main()
{
  int a, b;
  char op;
  
  cout << "Enter two numbers: ";
  cin >> a >> b;
  
  cout << "Enter the operator (+, -, *, /): ";
  cin >> op;
  
  switch (op) {
    case '+':
      cout << a << " + " << b << " = " << a + b;
      break;
    case '-':
      cout << a << " - " << b << " = " << a - b;
      break;
    case '*':
      cout << a << " * " << b << " = " << a * b;
      break;
    case '/':
      cout << a << " / " << b << " = " << a / b;
      break;
    default:
      cout << "Invalid operator!";
  }
  
  return 0;
}