用C#绘制正弦函数图像

以下是使用C#绘制正弦函数图像的示例代码：

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

public class SineFunction : Form
{
    private const int WIDTH = 800;
    private const int HEIGHT = 600;
    private const float X_SCALE = 4.0f;
    private const float Y_SCALE = 100.0f;

    private Pen pen = new Pen(Color.Blue, 2);
    private Graphics graphics;
    private Bitmap bitmap;

    public SineFunction()
    {
        bitmap = new Bitmap(WIDTH, HEIGHT);
        graphics = Graphics.FromImage(bitmap);

        // 设置窗口标题和大小
        Text = "正弦函数";
        Size = new Size(WIDTH, HEIGHT);
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        graphics.Clear(Color.White);

        // 绘制坐标轴
        graphics.DrawLine(Pens.Black, 0, HEIGHT / 2, WIDTH, HEIGHT / 2);
        graphics.DrawLine(Pens.Black, WIDTH / 2, 0, WIDTH / 2, HEIGHT);

        // 绘制正弦函数曲线
        for (int x = 0; x < WIDTH; x++)
        {
            float y = (float)(Math.Sin((x - WIDTH / 2) / X_SCALE) * Y_SCALE) + HEIGHT / 2;
            graphics.DrawRectangle(pen, x, y, 1, 1);
        }

        // 将绘制结果显示在窗口中
        e.Graphics.DrawImage(bitmap, 0, 0);
    }

    public static void Main()
    {
        Application.Run(new SineFunction());
    }
}

运行程序后会显示一个窗口，窗口中绘制了正弦函数的图像。可以通过修改代码中的常量来调整图像的大小和比例。