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FEI LI
828 Pointsit says I didn't initialize 4 to numSides using base constructor
I don't understand
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);
{
numSides=4;
}
}
}
2 Answers
Balazs Peak
46,160 PointsYou mixed this up a little bit ;)
The child class constructor should have the numSides in the parameter list. Think of it like this: you have two parameters, numSides and sideLength. You want to use both to construct the object, right? Well, you give the numSides to the base constructor, and it will do the job with it. In the body of the child class constructor function, you will handle the sideLength only.
Also, please note that 4 should be given to it when the function is called, not declared. You have to call this function somewhere, probably in the other page of the project ;)
The child class constructor should look something like this:
public Square (int sideLength, int numSides) : base(numSides); //you pass the numSides to parent constructor!
{
// here, you should probably do something like this:
this.sideLength = sideLength;
}
Balazs Peak
46,160 PointsYou are most welcome! Feel free to have me on facebook! Maybe later we can work together on projects or do something else!
facebook.com/puklibalazs
FEI LI
828 PointsGreat! I am very new on this though, has a long way ahead....... lol
Balazs Peak
46,160 Pointsit's ok, it'll be fun :D most of the time at least 8D
FEI LI
828 PointsFEI LI
828 Pointsclass Square : Polygon { public readonly int SideLength; public Square (int sideLength): base(4) { SideLength=sideLength; }
}It worked!. Square is the Polygon subclass, like you said, I don't need to worry about the numSides, cause I use the base constructor to pass it to the parent class.
Thank you very much!