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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 WinCalc
{
public partial class Form1 : Form
{
private int typeOperation = 0;
private double firstNumber ;
private bool firstNumberEntered;
public Form1()
{
InitializeComponent();
this.lblResultat.Text = "";
btn0.Click += new EventHandler(button_Click);
btn1.Click += new EventHandler(button_Click);
btn2.Click += new EventHandler(button_Click);
btn3.Click += new EventHandler(button_Click);
btn4.Click += new EventHandler(button_Click);
btn5.Click += new EventHandler(button_Click);
btn6.Click += new EventHandler(button_Click);
btn7.Click += new EventHandler(button_Click);
btn8.Click += new EventHandler(button_Click);
btn9.Click += new EventHandler(button_Click);
btnClear.Click += new EventHandler(btnClear_Click);
}
void button_Click(object sender, EventArgs e)
{
Button buttonclicked = sender as Button;
this.lblResultat.Text = lblResultat.Text + buttonclicked.Text;
}
private void btnAdd_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(this.lblResultat.Text))
{
firstNumber = Convert.ToDouble(lblResultat.Text);
firstNumberEntered = true;
typeOperation = 1;
lblResultat.Text = "";
}
}
private void btnMinus_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(this.lblResultat.Text))
{
firstNumber = Convert.ToDouble(lblResultat.Text);
firstNumberEntered = true;
typeOperation = 2;
lblResultat.Text = "";
}
}
private void btnMUL_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(this.lblResultat.Text))
{
firstNumber = Convert.ToDouble(lblResultat.Text);
firstNumberEntered = true;
typeOperation = 3;
lblResultat.Text = "";
}
}
private void btnDIV_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(this.lblResultat.Text))
{
firstNumber = Convert.ToDouble(lblResultat.Text);
firstNumberEntered = true;
typeOperation = 4;
lblResultat.Text = "";
}
}
private void btnEqual_Click(object sender, EventArgs e)
{
if (firstNumberEntered)
{
if (!string.IsNullOrEmpty(this.lblResultat.Text))
{
double secondNumber = Convert.ToDouble(lblResultat.Text);
double result = 0;
switch (typeOperation)
{
case 1:
result = firstNumber + secondNumber;
break;
case 2:
result = firstNumber - secondNumber;
break;
case 3:
result = firstNumber * secondNumber;
break;
case 4:
result = firstNumber / secondNumber;
break;
default:
break;
}
if (typeOperation >= 1 || typeOperation <= 4)
{
this.lblResultat.Text = result.ToString();
firstNumber = result;
}
}
}
}
void btnClear_Click(object sender, EventArgs e)
{
firstNumberEntered = false;
this.lblResultat.Text="";
}
}
} |
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