Find the error(s) in the following code. The TwoDArrays method should create a two- dimensional array and initialize all its values to one.
int[,] TwoDArrays()
{
int[,] intArray = new int[ 4, 4 ];
// Assign 1 to all cell values
for ( int intI = 0; intI < 4; intI++ )
{
intArray[ intI, intI ] = 1;
}
return intArray;
} // end method TwoDArrays
To assign each element in a two-dimensional array, nested for loops should be
used. The complete incorrect code reads:
// Exercise 18.15 Solution
// Initialize.cs (Incorrect)
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace Initialize
{
///
/// Summary description for FrmInitialize.
///
public class FrmInitialize : System.Windows.Forms.Form
{
private System.Windows.Forms.Label lblArray;
private System.Windows.Forms.ListBox lstArray;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
public FrmInitialize()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent
// call
//
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
// Windows Form Designer generated code
///
/// The main entry point for the application.
///
[STAThread]
static void Main()
{
Application.Run( new FrmInitialize() );
}
// calls TwoDArrays and prints the resulting array
private void FrmInitialize_Load(
object sender, System.EventArgs e )
{
int[,] intTempArray = TwoDArrays();
int intUpperBound = intTempArray.GetUpperBound( 0 );
// print each row of the array
for ( int intI = 0; intI <= intUpperBound; intI++ )
{
lstArray.Items.Add(intTempArray[ intI, 0 ] +
"\t" + intTempArray[ intI, 1 ] +
"\t” + intTempArray[ intI, 2 ] +
"\t" + intTempArray[ intI, 3 ] );
}
} // end method FrmInitialize_Load
// initializes a 2D array to contain all 1's
int[,] TwoDArrays()
{
int[,] intArray = new int[ 4, 4 ];
// assign 1 to all cell values
for ( int intI = 0; intI < 4; intI++ )
{
intArray[ intI, intI ] = 1;
}
Needs nested for loops
to access the entire array
return intArray;
} // end method TwoDArrays
} // end class FrmInitialize
}
Computer Science & Information Technology
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