Создание класса

Нажмем правой кнопкой мыши на название проекта, затем ADD – New Item

Или Project- Add Class

Возникает окно, нажать на Class.

Название желательно изменить

Расширение класса cs.

В примере с сараем

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace WindowsFormsApplication1

{

class Shed

{

public int Heigth { get; set; }

private int glubina;

public int Glubina

{

get { return glubina; }

set { glubina = value; }

}

private int width;

public int Width

{

get { return width; }

set

{

if (value > 0 && value < 100)

width = value;

}

}

public int VVV()

{

return Width * Heigth * Glubina;

}

}

}

В кнопке пишем

private void button1_Click(object sender, EventArgs e)

{

var shed1 = new Shed();

shed1.Width = Convert.ToInt16(textBox1.Text);

shed1.Heigth=Convert.ToInt16(textBox2.Text);

shed1.Glubina=Convert.ToInt16(textBox3.Text);

int V = shed1.VVV();

label1.Text = V.ToString();

}

Использование класса для работы с комплексными числами

Класс Compl

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace WindowsFormsApplication1

{

class Compl

{

public double x1 { get; set; }

public double x2 { get; set; }

public double y1 { get; set; }

public double y2 { get; set; }

public double SumRe()

{

return x1 + x2;

}

public double SumIm()

{

return y1 + y2;

}

public double RaznRe()

{

return x1 - x2;

}

public double RaznIm()

{

return y1 - y2;

}

public double PrRe()

{

return x1 * x2 - y1 * y2;

}

public double PrIm()

{

return x1 * y2 - x2 * y1;

}

public double DelRe()

{

return (x1 * x2 + y1 * y2) / (x2 * x2 + y2 * y2);

}

public double DelIm()

{

return (x2 * y1 - x1 * y2) / (x2 * x2 + y2 * y2);

}

public double Mo()

{

return Math.Sqrt(x1 * x1 + y1 * y1);

}

}

}

Форма

Основная программа

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 WindowsFormsApplication1

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

var shed1 = new Compl();

shed1.x1 = Convert.ToDouble(textBox1.Text);

shed1.x2 = Convert.ToDouble(textBox3.Text);

shed1.y1 = Convert.ToDouble(textBox2.Text);

shed1.y2 = Convert.ToDouble(textBox4.Text);

double X=shed1.SumRe();

textBox5.Text=X.ToString();

double Y=shed1.SumIm();

textBox6.Text=Y.ToString();

}

private void button2_Click(object sender, EventArgs e)

{

var shed1 = new Compl();

shed1.x1 = Convert.ToDouble(textBox1.Text);

shed1.x2 = Convert.ToDouble(textBox3.Text);

shed1.y1 = Convert.ToDouble(textBox2.Text);

shed1.y2 = Convert.ToDouble(textBox4.Text);

double X = shed1.RaznRe();

textBox5.Text = X.ToString();

double Y = shed1.RaznIm();

textBox6.Text = Y.ToString();

}

private void button3_Click(object sender, EventArgs e)

{

var shed1 = new Compl();

shed1.x1 = Convert.ToDouble(textBox1.Text);

shed1.x2 = Convert.ToDouble(textBox3.Text);

shed1.y1 = Convert.ToDouble(textBox2.Text);

shed1.y2 = Convert.ToDouble(textBox4.Text);

double X = shed1.PrRe();

textBox5.Text = X.ToString();

double Y = shed1.PrIm();

textBox6.Text = Y.ToString();

}

private void button4_Click(object sender, EventArgs e)

{

var shed1 = new Compl();

shed1.x1 = Convert.ToDouble(textBox1.Text);

shed1.x2 = Convert.ToDouble(textBox3.Text);

shed1.y1 = Convert.ToDouble(textBox2.Text);

shed1.y2 = Convert.ToDouble(textBox4.Text);

double X = shed1.DelRe();

textBox5.Text = X.ToString();

double Y = shed1.DelIm();

textBox6.Text = Y.ToString();

}

}

}