Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

C# C# Objects Inheritance Inheritance

Posted by Murtaza H
Murtaza H
8,735 Points

Little confusing can anyone help?

This is a bit confusing if anyone can help understand...

Polygon.cs 
namespace Treehouse.CodeChallenges
{
    class Polygon
    {
        public readonly int NumSides;

        public Polygon(int numSides)
        {
            NumSides = numSides;

        }
    }

  class Square : Polygon
    {
        public readonly int SideLength;

        public Square(int sideLength) : base(NumSides)
        {
            SideLength = sideLength;
        }
    }
}

1 Answer

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

You can't pass NumSides to the base when constructing Square, it isn't defined yet.

:point_right: Just follow the challenge instructions: "Use base to initialize NumSides to 4":

        public Square(int sideLength) : base(4)
Murtaza H
Murtaza H
8,735 Points

Thanks Stevens once again.. :-)