C#.Net Calculator Program

 C#.Net Windows Application Calculator Program

Coding:

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

 

namespace LearnWithThiru

{

    public partial class Calc : Form

    {

        int a;

        string x;

        public Calc()

        {

            InitializeComponent();

        }

 

        private void button1_Click(object sender, EventArgs e)

        {

            textBox1.Text = textBox1.Text +"1";

        }

 

        private void button2_Click(object sender, EventArgs e)

        {

            textBox1.Text = textBox1.Text + "2";

        }

 

        private void button3_Click(object sender, EventArgs e)

        {

            textBox1.Text = textBox1.Text + "3";

        }

 

        private void button4_Click(object sender, EventArgs e)

        {

            textBox1.Text = textBox1.Text + "4";

        }

 

        private void button5_Click(object sender, EventArgs e)

        {

            textBox1.Text = textBox1.Text + "5";

        }

 

        private void button6_Click(object sender, EventArgs e)

        {

            textBox1.Text = textBox1.Text + "6";

        }

 

        private void button7_Click(object sender, EventArgs e)

        {

            textBox1.Text = textBox1.Text + "7";

        }

 

        private void button8_Click(object sender, EventArgs e)

        {

            textBox1.Text = textBox1.Text + "8";

        }

 

        private void button9_Click(object sender, EventArgs e)

        {

            textBox1.Text = textBox1.Text + "9";

        }

 

        private void button10_Click(object sender, EventArgs e)

        {

            textBox1.Text = textBox1.Text + "0";

        }

 

        private void button11_Click(object sender, EventArgs e)

        {

             a = Convert.ToInt32(textBox1.Text);

            textBox1.Text = "";

            x = "ADD";

        }

      

        private void button15_Click(object sender, EventArgs e)

        {

        int b;

        int c;

            if (x == "ADD")

            {

                b = Convert.ToInt32(textBox1.Text);

                c = a + b;

                textBox1.Text = c.ToString();

            }

            else if (x == "SUB")

            {

                b = Convert.ToInt32(textBox1.Text);

                c = a - b;

                textBox1.Text = c.ToString();

            }

            else if (x == "MUL")

            {

                b = Convert.ToInt32(textBox1.Text);

                c = a * b;

                textBox1.Text = c.ToString();

            }

            else if (x == "DIV")

            {

                b = Convert.ToInt32(textBox1.Text);

                c = a / b;

                textBox1.Text = c.ToString();

            }

        }

 

        private void button12_Click(object sender, EventArgs e)

        {

            a = Convert.ToInt32(textBox1.Text);

            textBox1.Text = "";

            x = "SUB";

        }

 

        private void button13_Click(object sender, EventArgs e)

        {

            a = Convert.ToInt32(textBox1.Text);

            textBox1.Text = "";

            x = "MUL";

        }

 

        private void button14_Click(object sender, EventArgs e)

        {

            a = Convert.ToInt32(textBox1.Text);

            textBox1.Text = "";

            x = "DIV";

        }

    }

}