---

using System;
using System.Drawing;
using System.Windows.Forms;

namespace lr16
{
    public partial class Form1 : Form
    {
        private Label lblTitle;
        private GroupBox gbMethod;
        private Label lblMethodInfo;
        private RadioButton rbMethod1;
        private RadioButton rbMethod2;

        private GroupBox gbCoefficients;
        private Label lblA, lblB, lblC;
        private ComboBox cbA, cbB, cbC;

        private GroupBox gbVariables;
        private Label lblX, lblY, lblZ;
        private TextBox tbX, tbY, tbZ;
        private CheckBox cbIncludeZ;

        private Button btnCalculate;
        private Button btnClear;

        private GroupBox gbResult;
        private Label lblResult;

        private ListBox lbHistory;

        public Form1()
        {
            InitializeMyComponents();
        }

        private void InitializeMyComponents()
        {
            this.ClientSize = new Size(780, 670);
            this.Text = "Лабораторная работа №16 — Вариант 10";
            this.StartPosition = FormStartPosition.CenterScreen;
            this.FormBorderStyle = FormBorderStyle.FixedSingle;
            this.MaximizeBox = false;
            this.BackColor = Color.WhiteSmoke;

            // Заголовок
            lblTitle = new Label
            {
                Text = "Лабораторная работа №16\nМеханизм событий. Простые элементы управления\nВариант 10",
                Font = new Font("Segoe UI", 15F, FontStyle.Bold),
                TextAlign = ContentAlignment.MiddleCenter,
                Location = new Point(20, 10),
                Size = new Size(740, 80),
                ForeColor = Color.DarkBlue
            };

            // Группа способа расчёта
            gbMethod = new GroupBox
            {
                Text = "Способ расчёта",
                Location = new Point(30, 100),
                Size = new Size(720, 115),
                Font = new Font("Segoe UI", 10F, FontStyle.Bold)
            };

            lblMethodInfo = new Label
            {
                Text = "Выбран способ: Прямое вычисление",
                Location = new Point(20, 25),
                Size = new Size(500, 20)
            };

            rbMethod1 = new RadioButton
            {
                Text = "Способ 1: Прямое вычисление  W = a·x + b·y + c·z",
                Location = new Point(20, 50),
                AutoSize = true
            };
            rbMethod1.CheckedChanged += rbMethod1_CheckedChanged;

            rbMethod2 = new RadioButton
            {
                Text = "Способ 2: Через массив коэффициентов и цикл for",
                Location = new Point(20, 75),
                AutoSize = true
            };
            rbMethod2.CheckedChanged += rbMethod2_CheckedChanged;

            gbMethod.Controls.Add(lblMethodInfo);
            gbMethod.Controls.Add(rbMethod1);
            gbMethod.Controls.Add(rbMethod2);

            // Группа коэффициентов
            gbCoefficients = new GroupBox
            {
                Text = "Коэффициенты a, b, c",
                Location = new Point(30, 225),
                Size = new Size(370, 155),
                Font = new Font("Segoe UI", 10F, FontStyle.Bold)
            };

            lblA = new Label { Text = "a =", Location = new Point(30, 38), AutoSize = true };
            cbA = new ComboBox { Location = new Point(85, 35), Width = 140, DropDownStyle = ComboBoxStyle.DropDownList };

            lblB = new Label { Text = "b =", Location = new Point(30, 73), AutoSize = true };
            cbB = new ComboBox { Location = new Point(85, 70), Width = 140, DropDownStyle = ComboBoxStyle.DropDownList };

            lblC = new Label { Text = "c =", Location = new Point(30, 108), AutoSize = true };
            cbC = new ComboBox { Location = new Point(85, 105), Width = 140, DropDownStyle = ComboBoxStyle.DropDownList };

            gbCoefficients.Controls.Add(lblA);
            gbCoefficients.Controls.Add(cbA);
            gbCoefficients.Controls.Add(lblB);
            gbCoefficients.Controls.Add(cbB);
            gbCoefficients.Controls.Add(lblC);
            gbCoefficients.Controls.Add(cbC);

            // Группа переменных
            gbVariables = new GroupBox
            {
                Text = "Переменные x, y, z",
                Location = new Point(420, 225),
                Size = new Size(330, 155),
                Font = new Font("Segoe UI", 10F, FontStyle.Bold)
            };

            lblX = new Label { Text = "x =", Location = new Point(30, 38), AutoSize = true };
            tbX = new TextBox { Location = new Point(85, 35), Width = 120, TextAlign = HorizontalAlignment.Center };

            lblY = new Label { Text = "y =", Location = new Point(30, 73), AutoSize = true };
            tbY = new TextBox { Location = new Point(85, 70), Width = 120, TextAlign = HorizontalAlignment.Center };

            lblZ = new Label { Text = "z =", Location = new Point(30, 108), AutoSize = true };
            tbZ = new TextBox { Location = new Point(85, 105), Width = 120, TextAlign = HorizontalAlignment.Center };

            cbIncludeZ = new CheckBox
            {
                Text = "Включить z в расчёт",
                Location = new Point(30, 135),
                Checked = true
            };
            cbIncludeZ.CheckedChanged += cbIncludeZ_CheckedChanged;

            gbVariables.Controls.Add(lblX); gbVariables.Controls.Add(tbX);
            gbVariables.Controls.Add(lblY); gbVariables.Controls.Add(tbY);
            gbVariables.Controls.Add(lblZ); gbVariables.Controls.Add(tbZ);
            gbVariables.Controls.Add(cbIncludeZ);

            // Кнопки
            btnCalculate = new Button
            {
                Text = "Вычислить W",
                Location = new Point(30, 395),
                Size = new Size(200, 50),
                Font = new Font("Segoe UI", 11F, FontStyle.Bold),
                BackColor = Color.FromArgb(0, 122, 204),
                ForeColor = Color.White
            };
            btnCalculate.Click += btnCalculate_Click;

            btnClear = new Button
            {
                Text = "Очистить историю",
                Location = new Point(250, 395),
                Size = new Size(170, 50)
            };
            btnClear.Click += btnClear_Click;

            // Результат
            gbResult = new GroupBox
            {
                Text = "Результат расчёта",
                Location = new Point(30, 460),
                Size = new Size(720, 85),
                Font = new Font("Segoe UI", 10F, FontStyle.Bold)
            };

            lblResult = new Label
            {
                Text = "Результат: W = ?",
                Location = new Point(20, 30),
                Size = new Size(680, 40),
                Font = new Font("Segoe UI", 14F, FontStyle.Bold),
                ForeColor = Color.DarkGreen
            };
            gbResult.Controls.Add(lblResult);

            // История
            lbHistory = new ListBox
            {
                Location = new Point(30, 560),
                Size = new Size(720, 90),
                Font = new Font("Consolas", 9.5F)
            };

            // Добавляем на форму
            this.Controls.Add(lblTitle);
            this.Controls.Add(gbMethod);
            this.Controls.Add(gbCoefficients);
            this.Controls.Add(gbVariables);
            this.Controls.Add(btnCalculate);
            this