default constructor not catching

Question

When 0 is entered for the side and length the default constructor is supposed to use the default values of side = 7 and length = 10. I do not know why mine is not working can anyone please explain to me why mine this is happening.
using
System;
using
System.Collections.Generic;
using
SC = System. Console ;
using
System.Linq;
using
System.Text;
public
class abc
{
public static void Main()
{
String continueStr = "Y" ;
double side, length;
while (continueStr.ToUpper()!= "N" )
{
SC .Write( "
Enter the value for side " );
side =
Convert .ToDouble( SC .ReadLine());
while (side
{
SC .WriteLine( "The side may not be Negative! Please re-enter" );
SC .Write( "Enter the value for side " );
side =
Convert .ToDouble( SC .ReadLine());
}
SC .Write( "
Enter the value for length " );
length =
Convert .ToDouble( SC .ReadLine());
while (length
{
SC .WriteLine( "The width may not be Negative! Please re-enter" );
SC .Write( "Enter the value for length " );
length =
Convert .ToDouble( SC .ReadLine());
}
if (length == 0 && side == 0 )
{
Prism myPrism = new Prism (side, length);
myPrism.displayData();
}
else if (length >= 0 && side >= 0 )
{
Prism myPrism = new Prism (side, length);
myPrism.displayData();
}
SC .Write( "
Would you like to enter more data (Y/N) " );
continueStr =
SC .ReadLine();
}
}
// end of Main method
}
// end of Main class
public
class Square
{
private double side;     //in a square, both sides are the same
public Square ()
{
// default constructor
side = 7;
}
public Square ( double s)
{   side = s;
}
public double getSide()           // a getter method
{
return side;
}
public double findArea()
{
return (side * side);
}
}
// see the next page for more
public
class Prism : Square
{
private double side;
private double length;
public Prism(): base ()
{
length = 10;
//default constructor
}
public Prism( double s, double l): base (s)
{
length = l;
// non-default constructor
}
new public double findArea()
{
double surfaceArea;
surfaceArea =
base .findArea();
side =
Math .Round((((5.1 / 2) * (5.1 / 2)) + (9.2 * 9.2)),2);
return Math .Round((2 * surfaceArea) + (5.1 * 6.7) + (2 * (getSide() * 6.7)), 2);
}
//???
public double volume()
{
return Math .Round(findArea() * length,2) ;
}
public void displayData()
{
SC .WriteLine( "
The side of the Prism is {0,5}" ,
Math .Round(side, 2).ToString( "F2" ));
SC .WriteLine( "
The length of the Prism is {0,9}" ,
Math .Round(length, 2).ToString( "F2" ));
//SC.WriteLine("
The Volume is
}
}

Jennifer Bell · Answer

Thank you. When I ran it the default constructor being side = 7 from the public class square is not working when 0 is imputed as the side. It is catching the default constructor length from the prism : Square class though.

Sivaraman Dhamodaran · Answer

When the value entered for side and length is zero, you are not actually calling the default constructor.
if (length == 0 && side == 0)             {                 Prism myPrism = new Prism(side, length);                 myPrism.displayData();             }
Corrected One:
if (length == 0 && side == 0)             {                 Prism myPrism = new Prism();                 myPrism.displayData();             }