Program Main

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 WindowsFormsApp1
{
    public partial class Form1 : Form
    {

        static bool action = false;
        static bool action2 = false;
        static bool action3 = false;
        static double x, y;

        public Form1()
        {
            InitializeComponent();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            Ekran.add("1");
            textBox1.Text = Ekran.rets();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            Ekran.add("2");
            textBox1.Text = Ekran.rets();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            Ekran.add("3");
            textBox1.Text = Ekran.rets();
        }

        private void button5_Click(object sender, EventArgs e)
        {
            Ekran.add("4");
            textBox1.Text = Ekran.rets();
        }

        private void button6_Click(object sender, EventArgs e)
        {
            Ekran.add("5");
            textBox1.Text = Ekran.rets();
        }

        private void button7_Click(object sender, EventArgs e)
        {
            Ekran.add("6");
            textBox1.Text = Ekran.rets();
        }

        private void button8_Click(object sender, EventArgs e)
        {
            Ekran.add("7");
            textBox1.Text = Ekran.rets();
        }

        private void button9_Click(object sender, EventArgs e)
        {
            Ekran.add("8");
            textBox1.Text = Ekran.rets();
        }

        private void button10_Click(object sender, EventArgs e)
        {
            Ekran.add("9");
            textBox1.Text = Ekran.rets();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Ekran.add("0");
            textBox1.Text = Ekran.rets();
        }

        private void button11oo_Click(object sender, EventArgs e)
        {
            Ekran.add("00");
            textBox1.Text = Ekran.rets();
        }

        private void button12dot_Click(object sender, EventArgs e)
        {
            Ekran.add(".");
            textBox1.Text = Ekran.rets();
        }

        private void button21_Click(object sender, EventArgs e)
        {
            Ekran.clr();
            textBox1.Text = "";
            label1.Text = "";
            Ekran.setdzialanie(0);
        }

        private void button22_Click(object sender, EventArgs e)
        {
            Calc.MemPlus(Ekran.retd());
            radioButton1.Checked = true;
            Ekran.clr();

        }

        private void button23_Click(object sender, EventArgs e)
        {
            Calc.MemMinus(Ekran.retd());
            radioButton1.Checked = true;
            Ekran.clr();
        }

        private void button24_Click(object sender, EventArgs e)
        {
            Ekran.set(Calc.MemR());
            textBox1.Text = Ekran.rets();
            Ekran.clr();

        }

        private void button25_Click(object sender, EventArgs e)
        {
            Calc.MemCLR();
            radioButton1.Checked = false;
        }

        private void button13_Click(object sender, EventArgs e)
        {
            if (Ekran.ostdzialanied() == 2)
            {
                if(!action)
                    y = Double.Parse(textBox1.Text);
                x = Calc.Roznica(x, y);
                Ekran.set(x);
                textBox1.Text = Ekran.rets();
                action = true;
            }
            else
            {

                Ekran.setdzialanie(2);
                label1.Text = Ekran.ostdzialanie();
                x = Ekran.retd();

            }
            Ekran.clr();
            action2 = false;
            action3 = false;
        }

        private void button12_Click(object sender, EventArgs e)
        {
            if (Ekran.ostdzialanied() == 3)
            {
                y = Double.Parse(textBox1.Text);
                x = Calc.Iloczyn(x, y);
                Ekran.set(x);
                textBox1.Text = Ekran.rets();
                action2 = true;
            }
            else
            {
                Ekran.setdzialanie(3);
                label1.Text = Ekran.ostdzialanie();
                x = Ekran.retd();

            }
            Ekran.clr();
            action = false;
            action3 = false;

        }

        private void button11_Click(object sender, EventArgs e)
        {
            if (Ekran.ostdzialanied() == 4)
            {
                y = Double.Parse(textBox1.Text);
                try
                {
                    x = Calc.Iloraz(x, y);
                    Ekran.set(x);
                    textBox1.Text = Ekran.rets();
                }
                catch (Exception E)
                {
                    textBox1.Text = "Dzielenie przez 0";
                }
                action3 = true;
            }
            else
            {
                Ekran.setdzialanie(4);
                label1.Text = Ekran.ostdzialanie();
                x = Ekran.retd();
            }
            Ekran.clr();
            action = false;
            action2 = false;

        }

        private void button20_Click(object sender, EventArgs e)
        {

            switch (Ekran.ostdzialanied())
            {
                case 1:
                    y = Double.Parse(textBox1.Text);
                    y = Calc.Suma(x, y);
                    Ekran.set(y);
                    textBox1.Text = Ekran.rets();
                    action = false;
                    action2 = false;
                    action3 = false;
                    break;
                case 2:
                    if(!action)
                        y = Double.Parse(textBox1.Text);
                    x = Calc.Roznica(x, y);
                    Ekran.set(x);
                    textBox1.Text = Ekran.rets();
                    action = true;
                    action2 = false;
                    action3 = false;
                    break;
                case 3:
                    if(!action2)
                        y = Double.Parse(textBox1.Text);
                    x = Calc.Iloczyn(x, y);
                    Ekran.set(x);
                    textBox1.Text = Ekran.rets();
                    action = false;
                    action2 = true;
                    action3 = false;
                    break;
                case 4:
                    if(!action3)
                        y = Double.Parse(textBox1.Text);
                    x = Calc.Iloraz(x, y);
                    Ekran.set(x);
                    textBox1.Text = Ekran.rets();
                    action = false;
                    action2 = false;
                    action3 = true;
                    break;
                case 5:
                    x = Ekran.retd();
                    x = Calc.Kwadrat(x);
                    Ekran.set(x);
                    textBox1.Text = Ekran.rets();
                    action = false;
                    action2 = false;
                    action3 = false;
                    break;
                case 6:
                    x = Ekran.retd();
                    x = Calc.Odwr(x);
                    Ekran.set(x);
                    textBox1.Text = Ekran.rets();
                    action = false;
                    action2 = false;
                    action3 = false;
                    break;
                case 7:
                    x = Ekran.retd();
                    x = Calc.Procent(x);
                    Ekran.set(x);
                    textBox1.Text = Ekran.rets();
                    action = false;
                    action2 = false;
                    action3 = false;
                    break;
                case 8:
                    x = Ekran.retd();
                    x = Calc.Negacja(x);
                    Ekran.set(x);
                    textBox1.Text = Ekran.rets();
                    action = false;
                    action2 = false;
                    action3 = false;
                    break;

                case 9:
                    x = Ekran.retd();
                    x = Calc.Sqrt(x);
                    Ekran.set(x);
                    textBox1.Text = Ekran.rets();
                    action = false;
                    action2 = false;
                    action3 = false;
                    break;

                default:
                    action = false;
                    action2 = false;
                    action3 = false;
                    break;

            }

        }

        private void button15_Click(object sender, EventArgs e)
        {
            x = Ekran.retd();
            x = Calc.Kwadrat(x);
            Ekran.set(x);
            textBox1.Text = Ekran.rets();
            Ekran.setdzialanie(5);
            label1.Text = Ekran.ostdzialanie();

            action = false;
            action2 = false;
            action3 = false;
        }

        private void button16_Click(object sender, EventArgs e)
        {
            x = Ekran.retd();
            x = Calc.Odwr(x);
            Ekran.set(x);
            textBox1.Text = Ekran.rets();
            Ekran.setdzialanie(6);
            label1.Text = Ekran.ostdzialanie();

            action = false;
            action2 = false;
            action3 = false;
        }

        private void button18_Click(object sender, EventArgs e)
        {
            x = Ekran.retd();
            x = Calc.Procent(x);
            Ekran.set(x);
            textBox1.Text = Ekran.rets();
            Ekran.setdzialanie(7);
            label1.Text = Ekran.ostdzialanie();

            action = false;
            action2 = false;
            action3 = false;
        }

        private void button19_Click(object sender, EventArgs e)
        {
            x = Ekran.retd();
            x = Calc.Negacja(x);
            Ekran.set(x);
            textBox1.Text = Ekran.rets();
            Ekran.setdzialanie(8);
            label1.Text = Ekran.ostdzialanie();

            action = false;
            action2 = false;
            action3 = false;
        }

        private void button17_Click(object sender, EventArgs e)
        {
            x = Ekran.retd();
            x = Calc.Sqrt(x);
            Ekran.set(x);
            textBox1.Text = Ekran.rets();
            Ekran.setdzialanie(9);
            label1.Text = Ekran.ostdzialanie();

            action = false;
            action2 = false;
            action3 = false;
        }

        private void button14_Click(object sender, EventArgs e)
        {

            if (Ekran.ostdzialanied() == 1)
            {
                y = Double.Parse(textBox1.Text);
                y = Calc.Suma(x, y);
                Ekran.set(y);
                textBox1.Text = Ekran.rets();
            }
            else
            {
               Ekran.setdzialanie(1);
               label1.Text = Ekran.ostdzialanie();
               x = Ekran.retd();
            }
                Ekran.clr();
            action = false;

        }
    }
}