صنع آلة حاسبة بإستخدام برنامج Visual Stdio

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 test_calc { public partial class Form1 : Form { double val = 0; string operat = ""; bool op_pressed = false; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { } private void button_Clik(object sender, EventArgs e) { if ((result.Text == "0") || (op_pressed)) result.Clear(); Button b = (Button)sender; result.Text = result.Text + b.Text; } private void operat_click(object sender, EventArgs e) { Button b = (Button)sender; operat = b.Text; val = Double.Parse(result.Text); op_pressed = true; } private void button18_Click(object sender, EventArgs e) { switch (operat) { case "+": result.Text = (val + Double.Parse(result.Text)).ToString(); break; case "-": result.Text = (val - Double.Parse(result.Text)).ToString(); break; case "*": result.Text = (val * Double.Parse(result.Text)).ToString(); break; case "/": result.Text = (val / Double.Parse(result.Text)).ToString(); break; case "%": result.Text = (val % Double.Parse(result.Text)).ToString(); break; case "cos": result.Text = (cos(val) ).ToString(); break; case "sin": result.Text = (sin(val)).ToString(); break; case "tan": result.Text = (tan(val)).ToString(); break; default: break; } op_pressed = false; } private void button16_Click(object sender, EventArgs e) { result.Text = "0"; } private void button21_Click(object sender, EventArgs e) { } } }