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How to make a simple calculator in c#

How to make a simple calculator in c#


calculator in c# waqeeh

calculator in c# waqeeh



calculator in c# waqeeh


calculator in c# waqeeh


calculator in c# waqeeh


calculator in c# waqeeh


calculator in c# waqeeh



calculator in c# waqeeh


Code


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
    {
        int num1, num2;
        char sign;
        public Form1()
        {
            InitializeComponent();
        }

        private void button11_Click(object sender, EventArgs e)
        {
            num2=int.Parse(textBox1.Text);
            if (sign == '+')
                textBox1.Text = (num1 + num2).ToString();
            else if (sign == '-')
                textBox1.Text = (num1 - num2).ToString();
            else if (sign == '*')
                textBox1.Text = (num1 * num2).ToString();
            else if (sign == '/')
                textBox1.Text = (num1 / num2).ToString();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            textBox1.Text += "1";
        }

        private void button2_Click(object sender, EventArgs e)
        {
            textBox1.Text += "2";
        }

        private void button3_Click(object sender, EventArgs e)
        {
            textBox1.Text += "3";
        }

        private void button4_Click(object sender, EventArgs e)
        {
            textBox1.Text += "4";
        }

        private void button5_Click(object sender, EventArgs e)
        {
            textBox1.Text += "5";
        }

        private void button6_Click(object sender, EventArgs e)
        {
            textBox1.Text += "6";
        }

        private void button7_Click(object sender, EventArgs e)
        {
            textBox1.Text += "7";
        }

        private void button8_Click(object sender, EventArgs e)
        {
            textBox1.Text += "8";
        }

        private void button9_Click(object sender, EventArgs e)
        {
            textBox1.Text += "9";
        }

        private void button16_Click(object sender, EventArgs e)
        {
            textBox1.Text += "0";
        }

        private void button15_Click(object sender, EventArgs e)
        {
            num1 = int.Parse(textBox1.Text);
            sign = '+';
            textBox1.Text = "";
        }

        private void button14_Click(object sender, EventArgs e)
        {
            num1 = int.Parse(textBox1.Text);
            sign = '-';
            textBox1.Text = "";
        }

        private void button13_Click(object sender, EventArgs e)
        {
            num1 = int.Parse(textBox1.Text);
            sign = '*';
            textBox1.Text = "";
        }

        private void button12_Click(object sender, EventArgs e)
        {
            num1 = int.Parse(textBox1.Text);
            sign = '/';
            textBox1.Text = "";
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}



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