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C# C# Objects Inheritance Inheritance

Posted by dustin rimel
dustin rimel
8,734 Points

Challenge trouble with Polygon class and Square class

Typed the code below and the error I get is Did you initialize the field numSides to 4 in the base constructor.

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;  

    }
}

}

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;  

        }
    }
}

2 Answers

Seth Kroger
Seth Kroger
56,413 Points
Seth Kroger
Seth Kroger
56,413 Points

Since squares always have four sides you want to set the number of sides to 4, not a variable (which is undefined in the scope of the Square class anyway).

dustin rimel
dustin rimel
8,734 Points

I don't understand where I set the number of sides to 4

dustin rimel
dustin rimel
8,734 Points
dustin rimel
dustin rimel
8,734 Points

Nevermind I get it:

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(4)
    {
      SideLength = sideLength;  

    }
}

}