I need help in programming in c# (Microsoft Visual Studio C# 2010 Express) I need to be able to write a second degree function in a textbox and then when I click enter it draws the graph in a coordinatesystem for me. With other words I need to create a graph/parabola drawer for whatever second degree function I choose.
So far I have managed to make a first degree function drawer, I just have no idea how to make one for a second degree function.
Here are the codes for the first degree function drawer:
namespace Graph drawer
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
int K;
int Ystart;
int Yend;
int Y1;
protected override void OnPaint(PaintEventArgs e)
{
Graphics g = e.Graphics;
Pen p=new Pen(Color.Black);
g.DrawLine(p, 100, 250, 400, 250);
g.DrawLine(p, 250, 100, 250, 400);
g.DrawLine(p, 100, Ystart, 400, Yend);
}
private void btnDraw_Click(object sender, EventArgs e)
{
K = int.Parse(tbxFirstX.Text);
int m = int.Parse(tbxM.Text);
Ystart = 250 - 10 * m + K * 150;
Yend = 250 - 10 * m - K * 150;
Invalidate();
}