06. Create a calculator using if, else, while and switch

#include <bits/stdc++.h>
using namespace std;

void printMenu()
{
  cout << "1. Addition" << endl;
  cout << "2. Subtraction" << endl;
  cout << "3. Multiplication" << endl;
  cout << "4. Division" << endl;
  cout << "0. Exit" << endl;
  cout << "Enter your choice: ";
}

int main()
{
  while (true)
  {
    int a, b;
    int choice;
    printMenu();
    cin >> choice;

    switch (choice)
    {
      case 1:
        cout << "Enter two numbers: ";
        cin >>
         a >> b;
        cout << a << " + " << b << " = " << a + b << endl;
        break;
      case 2:
        cout << "Enter two numbers: ";
        cin >> a >> b;
        cout << a << " - " << b << " = " << a - b << endl;
        break;
      case 3:
        cout << "Enter two numbers: ";
        cin >> a >> b;
        cout << a << " * " << b << " = " << a * b << endl;
        break;
      case 4:
        cout << "Enter two numbers: ";
        cin >> a >> b;
        if (b == 0)
          cout << "Error: Division by zero" << endl;
        else
          cout << a << " / " << b << " = " << a / b << endl;
        break;
      case 0:
        return 0;
      default:
        cout << "Error: Invalid choice" << endl;
    }

  }
  return 0;
}