static void Main(string[] args)
{
cde f1 = new cde(2);
cde f2 = new cde(2);
//cde f2 = f1;
Console.WriteLine(ReferenceEquals(f1, f2)); //static method, object class
Console.WriteLine(f1.Equals(f2)); //instance method
Console.WriteLine(cde.Equals(f1, f2)); //static method
Console.WriteLine(f1 == f2); // yun suan fu method
}
public override bool Equals(object obj)
{
//return base.Equals(obj);
if ((obj == null) || obj.GetType() != typeof(cde))
{
return(false);
}
cde f3 = (cde)obj;
if (f3.a == this.a)
{
return(true);
}
else
{
return(false);
}
}