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using System;
public struct CInt
{
int data;
public CInt (int data)
{
this.data = data;
}
public static implicit operator CInt (int xx)
{
return new CInt (xx);
}
public static implicit operator int (CInt xx)
{
return xx.data;
}
}
public class Klass
{
CInt? t;
public Klass (CInt? t)
{
this.t = t;
}
public CInt? Value
{
get
{
return t;
}
}
}
public class MainClass
{
public static int Main ()
{
var v = new Klass (new CInt (3));
if (v.Value == 1)
return 1;
if (v.Value != 3)
return 2;
if (v.Value == null)
return 3;
var v2 = new Klass (null);
if (v2.Value != null)
return 4;
Console.WriteLine ("OK");
return 0;
}
}
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