calculator[Mercado]

[zero123-max]

using System;

class Calculator
{
static void Main(string[] args)
{
double num1, num2, result;
string operation;

    // Method to get a valid number from user
    num1 = GetValidNumber("Enter first number:");
    operation = GetValidOperation();
    num2 = GetValidNumber("Enter second number:");

    // Perform calculation based on operation
    switch (operation)
    {
        case "+":
            result = num1 + num2;
            Console.WriteLine($"Result: {num1} + {num2} = {result}");
            break;
        case "-":
            result = num1 - num2;
            Console.WriteLine($"Result: {num1} - {num2} = {result}");
            break;
        case "*":
            result = num1 * num2;
            Console.WriteLine($"Result: {num1} * {num2} = {result}");
            break;
        case "/":
            if (num2 != 0)
            {
                result = num1 / num2;
                Console.WriteLine($"Result: {num1} / {num2} = {result}");
            }
            else
            {
                Console.WriteLine("Error: Division by zero is not allowed.");
            }
            break;
        default:
            Console.WriteLine("Invalid operation entered.");
            break;
    }
}

// Helper function to ensure valid number input
static double GetValidNumber(string prompt)
{
    double number;
    while (true)
    {
        Console.WriteLine(prompt);
        string input = Console.ReadLine();
        if (double.TryParse(input, out number))
        {
            return number;
        }
        else
        {
            Console.WriteLine("Invalid input. Please enter a valid number.");
        }
    }
}

// Helper function to ensure valid operation input
static string GetValidOperation()
{
    string operation;
    while (true)
    {
        Console.WriteLine("Enter an operation (+, -, *, /):");
        operation = Console.ReadLine();
        if (operation == "+" || operation == "-" || operation == "*" || operation == "/")
        {
            return operation;
        }
        else
        {
            Console.WriteLine("Invalid operation. Please enter +, -, *, or /.");
        }
    }
}

}