Find the error(s) in the following code (the method should assign the value 14 to vari- able intResult).
int Sum()
{
string strNumber = "4";
int intNumber = 10;
int intResult;
intResult = strNumber + intNumber;
return intResult;
} // end method Sum
The code must explicitly convert strNumber to int. The complete incorrect code
reads:
// Sum.cs (Incorrect)
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace Sum
{
///
/// Summary description for FrmSum.
///
public class FrmSum : System.Windows.Forms.Form
{
private System.Windows.Forms.Label lblSumOut;
private System.Windows.Forms.Label lblNumber2Out;
private System.Windows.Forms.Label lblNumber1Out;
private System.Windows.Forms.Label lblSum;
private System.Windows.Forms.Label lblNumber2;
private System.Windows.Forms.Label lblNumber1;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
public FrmSum()
{
//
// 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 FrmSum() );
}
// prints the result of the Sum method
private void FrmSum_Load( object sender, System.EventArgs e )
{
lblSumOut.Text = Convert.ToString( Sum() );
} // end method FrmSum_Load
// takes the sum of a string and an int
int Sum()
{
string strNumber = "4";
int intNumber = 10;
int intResult;
intResult = strNumber + intNumber;
return intResult;
} // end method Sum
} // end class FrmSum
}
The complete corrected code should read:
// Sum.cs (Correct)
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace Sum
{
///
/// Summary description for FrmSum.
///
public class FrmSum : System.Windows.Forms.Form
{
private System.Windows.Forms.Label lblSumOut;
private System.Windows.Forms.Label lblNumber2Out;
private System.Windows.Forms.Label lblNumber1Out;
private System.Windows.Forms.Label lblSum;
private System.Windows.Forms.Label lblNumber2;
private System.Windows.Forms.Label lblNumber1;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
public FrmSum()
{
//
// 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 FrmSum() );
}
// prints the result of the Sum method
private void FrmSum_Load( object sender, System.EventArgs e )
{
lblSumOut.Text = Convert.ToString( Sum() );
} // end method FrmSum_Load
// takes the sum of a string and an integer
int Sum()
{
string strNumber = "4";
int intNumber = 10;
int intResult;
intResult = Int32.Parse( strNumber ) + intNumber;
return intResult;
} // end method Sum
} // end class FrmSum
}
Computer Science & Information Technology
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