Beginning C# 3.0

A.6. Chapter 8

A.6.1. Exercise 1 Solution

The code has a user interface with two textboxes for getting the starting and ending heights for the table and a listbox or ListView object to present the results. The button click event code does most of the work and one solution using a listbox is shown here:

const double MININCHES = 36;
const double MAXINCHES = 96;

private void btnCalc_Click(object sender, EventArgs e)
{
  bool flag;
  int i;
  int j;
  double start;
  double end;
  double male;
  double female;
  double[,] idealWeights;
  string buff;

  //=================== Input ==========================
  flag = double.TryParse(txtStart.Text, out start); // Table start
  if (flag == false)
  {
    MessageBox.Show("Numeric only.");
    txtStart.Focus();
    return;
  }

flag = double.TryParse(txtEnd.Text, out end); // Table end if (flag == false) { MessageBox.Show("Numeric only."); txtEnd.Focus(); return; } //=================== Validate Inputs ================ if (start < MININCHES || start > MAXINCHES) // Check table limits { MessageBox.Show("Table can only span " + MININCHES.ToString() + " to " + MAXINCHES + " inches."); txtStart.Focus(); return; } if (end < MININCHES || end > MAXINCHES) { MessageBox.Show("Table can only span " + MININCHES.ToString() + " to " + MAXINCHES + " inches."); txtStart.Focus(); return; } if (end <= start) // Can we display anything? { MessageBox.Show("Starting value must be less than ending value"); txtStart.Focus(); return; } // Define the array for table data idealWeights = new double[2, ...