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

MD NOMAN HOSSAIN
MD NOMAN HOSSAIN
10,833 Points
Posted by MD NOMAN HOSSAIN
MD NOMAN HOSSAIN
10,833 Points

The Polygon class represents a 2 dimensional shape. It has a public field named NumSides. Create a new type of polygon c

How do I Use the base to initialize numSide to 4?

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 (int Polygon),
        {
          SideLength = sideLength (4);
        }

        }
}

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

You have some misplaced arguments.

The challenge error message included a clue: "Bummer! Did you initialize the field 'numSides' to 4 in the base constructor?". When you call base you should pass the value 4. Also there should not be a comma after the call to base.

The argument that should have been passed to base seems to appear as a stray element on the line where SideLength is assigned. It doesn't belong here and makes it seem that you are calling sideLength as a method and passing it the argument 4.