using System; using System.Collections; public class GoodCompare { public static void Main() { Name president = new Name ("A", "B"); Name first = new Name ("C", "D"); Console.WriteLine("The hash codes for first and president are: "); if (president.GetHashCode() == first.GetHashCode()) Console.WriteLine("equal"); else Console.WriteLine("not equal"); } } public class Name { protected String first; protected char initial; protected String last; public Name(String f, String l) { first = f; last = l; } public Name(String f, char i, String l) : this(f,l) { initial = i; } public override String ToString() { if (initial == 'u0000') return first + " " + last; else return first + " " + initial + " " + last; } public override bool Equals(Object o) { if (!(o is Name)) return false; Name name = (Name)o; return first == name.first && initial == name.initial && last == name.last; } public override int GetHashCode() { return first.GetHashCode() + (int)initial + last.GetHashCode(); } }