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 Projekt_1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        string A = "";
        string B = "";
        int Aint;
        int Bint;
        string OPER;
        int licz = 0;



        private void button1_Click(object sender, EventArgs e)
        {
            if (licz == 0)
            {
                A += "1";
                textBox1.Text += "1";
            }
            else
            {
                B += "1";
                textBox1.Text += "1";
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (licz == 0)
            {
                A += "2";
                textBox1.Text += "2";
            }
            else
            {
                B += "2";
                textBox1.Text += "2";
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (licz == 0)
            {
                A += "3";
                textBox1.Text += "3";
            }
            else
            {
                B += "3";
                textBox1.Text += "3";
            }
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (licz == 0)
            {
                A += "4";
                textBox1.Text += "4";
            }
            else
            {
                B += "4";
                textBox1.Text += "4";
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            if (licz == 0)
            {
                A += "5";
                textBox1.Text += "5";
            }
            else
            {
                B += "5";
                textBox1.Text += "5";
            }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            if (licz == 0)
            {
                A += "6";
                textBox1.Text += "6";
            }
            else
            {
                B += "6";
                textBox1.Text += "6";
            }
        }

        private void button7_Click(object sender, EventArgs e)
        {
            if (licz == 0)
            {
                A += "7";
                textBox1.Text += "7";
            }
            else
            {
                B += "7";
                textBox1.Text += "7";
            }
        }

        private void button8_Click(object sender, EventArgs e)
        {
            if (licz == 0)
            {
                A += "8";
                textBox1.Text += "8";
            }
            else
            {
                B += "8";
                textBox1.Text += "8";
            }
        }

        private void button9_Click(object sender, EventArgs e)
        {
            if (licz == 0)
            {
                A += "9";
                textBox1.Text += "9";
            }
            else
            {
                B += "9";
                textBox1.Text += "9";
            }
        }

        private void button10_Click(object sender, EventArgs e)
        {
            if (licz == 0)
            {
                A += "0";
                textBox1.Text += "0";
            }
            else
            {
                B += "0";
                textBox1.Text += "0";
            }
        }

        private void button15_Click(object sender, EventArgs e)
        {
            Int32.TryParse(A, out Aint);
            Int32.TryParse(B, out Bint);

            if ( !String.IsNullOrEmpty(A) && !String.IsNullOrEmpty(B) && OPER != null)



            switch (OPER)
                {
                    case "+":
                        textBox1.Text += "=" + (Aint + Bint).ToString();
                        break;

                    case "-":
                        textBox1.Text += "=" + (Aint - Bint).ToString();
                        break;

                    case "*":
                        textBox1.Text += "=" + (Aint * Bint).ToString();
                        break;

                    case "^":
                        textBox1.Text += "=" + Math.Pow(Aint,Bint).ToString();
                        break;

                    case "/":
                        try
                        {
                            textBox1.Text += "=" + (Aint / Bint).ToString();
                        }
                        catch (Exception err)
                        {
                            MessageBox.Show("Nie dzielimy przez zero!", "Uwaga", MessageBoxButtons.OK);
                        }
                        finally
                        {
                        }
                        break;


                }
             A = "";
             B = "";
             OPER = null;
             licz = 0;
        }

        private void button11_Click(object sender, EventArgs e)
        {
            if (OPER == null && !String.IsNullOrEmpty(A))
            {
                OPER += "+";
                textBox1.Text += "+";
                licz = 1;
            }
        }

        private void button12_Click(object sender, EventArgs e)
        {
            if (OPER == null && !String.IsNullOrEmpty(A))
            {
                OPER += "-";
                textBox1.Text += "-";
                licz = 1;
            }
        }

        private void button13_Click(object sender, EventArgs e)
        {
            if (OPER == null && !String.IsNullOrEmpty(A))
            {
                OPER += "*";
                textBox1.Text += "*";
                licz = 1;
            }
        }

        private void button14_Click(object sender, EventArgs e)
        {
            if (OPER == null && !String.IsNullOrEmpty(A))
            {
                OPER += "/";
                textBox1.Text += "/";
                licz = 1;
            }
        }

        private void button16_Click(object sender, EventArgs e)
        {
            if (OPER == null && !String.IsNullOrEmpty(A))
            {
                OPER += "^";
                textBox1.Text += "^";
                licz = 1;
            }
        }

        private void button17_Click(object sender, EventArgs e)
        {
            textBox1.Clear();
            A = "";
            B = "";
            OPER = null;
            licz = 0;
            Aint = 0;
            Bint = 0;

        }

        //private void check()
        //{
        //    string slowo = "a+b=c";

        //    string[] val = slowo.split("+".tochararray());
        //    a = int32.parse(val[0]);
        //    b = int32.parse(val[1].split("=".tochararray())[0]);
        //}


    }
}