Using IComparer for sorting

Question

I am trying to use an IComparer to sort a list of Points. Here is the IComparer class:

public class CoordinatesBasedComparer : IComparer
{
    p         


        

Answer 1

public class CoordinatesBasedComparer : IComparer, IComparer
{
    public int Compare(Point a, Point b)
    {
        if ((a.x == b.x) && (a.y == b.y))
            return 0;
        if ((a.x < b.x) || ((a.x == b.x) && (a.y < b.y)))
            return -1;

        return 1;
    }
    int IComparer.Compare(Object q, Object r)
    {
        return Compare((Point)q, (Point)r);            
    }
}