Answered: File Edit View Git Project Build Debug…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Question

i need to fix this code because when compute code all function error

give mw the input function and fix code and i need this code curve output

using System;
using System.Data;
using System.Drawing;
using System.Linq.Expressions;
using System.Windows.Forms;

namespace WindowsFormsApp11
{
public partial class Form1 : Form
{
private DataRow xValue;
private string expression;

public Form1()
{
InitializeComponent();
}

private void DrawButton_Click(object sender, EventArgs e)
{
DrawFunction();
}

private void DrawFunction()
{
try
{
using (Graphics g = this.displayArea.CreateGraphics())
{
g.Clear(Color.White);
Pen pen = new Pen(Color.Black);

for (int x = 0; x < this.displayArea.Width; x++)
{
// Parse the expression from the textbox
string function = functionInput.Text;
// Evaluate the function for each x-value
double yValue = EvaluateExpression(function, x);
int y = (int)(100 * yValue);
g.DrawRectangle(pen, x, this.displayArea.Height / 2 - y, 1, 1);
}
}
}
catch (Exception ex)
{
MessageBox.Show("Error drawing function: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}

private double EvaluateExpression(string expression, double xValue)
{
try
{
DataTable table = new DataTable();
table.Columns.Add("x", typeof(double));
table.Rows.Add(xValue);
return Convert.ToDouble(table.Compute(expression, ""));
}
catch
{
throw new InvalidOperationException("Invalid mathematical expression");
}
}

private void FunctionInput_TextChanged(object sender, EventArgs e)
{
// Redraw the function curve when the text in the textbox changes
DrawFunction();
}

[STAThread]
static void M()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}

private void drawButton_Click_1(object sender, EventArgs e)
{
DrawFunction();
}

private void button1_Click(object sender, EventArgs e)
{
displayArea.Refresh();
}
private void ClearDisplayArea()
{
displayArea.Refresh();
}
}
}

this is design picture