using System;

public class Program

{

    public static void Main()

    {

        //Console.WriteLine("Hello World");

        sample2();

    }

    public static void sample1()

    {

        //Console.WriteLine("");

        //simple looping while on method

        //for loop syntax

        for(int x=1; x <=3; x++)

        {

            //Code

            Console.WriteLine("");

        }               

    }

    public static void sample2()

    {

        // while looping syntax, if else and switch statement

        int x;

        x = 1;

        double num1, num2;

        char op;

        double result;

        while (x < 3)

        {

            Console.WriteLine("CALCULATOR");

            Console.Write("Enter number: ");

            num1 = Convert.ToDouble(Console.ReadLine());

            Console.Write("Enter OP (+, - , * , /, %) ");

            op = Convert.ToChar(Console.ReadLine());

            Console.Write("Enter second number: ");

            num2 = Convert.ToDouble(Console.ReadLine());

            switch (op)

            {

                case '+':

                    result = num1 + num2;

                    Console.WriteLine("{0}{1}{2}={3}", num1, op, num2, result);

                    break;

                case '-':

                    result = num1 - num2;

                    Console.WriteLine("{0}{1}{2}={3}", num1, op, num2, result);

                    break;

                case '*':

                    result = num1 * num2;

                    Console.WriteLine("{0}{1}{2}={3}", num1, op, num2, result);

                    break;

                case '/':

                    result = num1 / num2;

                    Console.WriteLine("{0}{1}{2}={3}", num1, op, num2, result);

                    break;

                default:

                    Console.WriteLine("Ayaw pataka input diha");

                    break;

            }

            if(x==1){

                Console.WriteLine("Try again");

                Console.WriteLine("");

            }else if (x==2){

                Console.WriteLine("You only have one try left");

                Console.WriteLine("");

            }else{

                Console.WriteLine("No more tries");

            }

            x++;

        }

    }

}