using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace calculator
{
    public partial class Form1 : Form
    {

        //Field
        int firstNumber;
        int secondNumber;



        public Form1()
        {
            InitializeComponent();
        }




        private void operator_clickBT_Click(object sender, EventArgs e)
        {
            int result = 0;
            bool isNumber = int.TryParse(inputTB.Text, out result);
            if (!isNumber)
            {
                MessageBox.Show(inputTB.Text + "is not a number");
                return;
            }
            firstNumber = result;
            inputTB.Text = string.Empty;

            /*int num = int.TryParse(inputTB.Text);
            try
            {
                int num = Convert.ToInt32(inputTB.Text);
            }
            catch (Exception ex)
            {

                MessageBox.Show("You are a idiot");
            }
            */
        }

        private void calculateBT_Click(object sender, EventArgs e)
        {
            int result = 0;
            bool isNumber = int.TryParse(inputTB.Text, out result);
            if (!isNumber)
            {
                MessageBox.Show(inputTB.Text + "is not a number");
                return;
            }
            int secondNumber = result;

            inputTB.Text = (firstNumber + secondNumber).ToString();
        }



    }
}