60 lines
1.1 KiB
C#
60 lines
1.1 KiB
C#
using System;
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public interface IVehicle {
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int Start ();
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int Stop ();
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int Turn ();
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}
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public class Base : IVehicle {
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int IVehicle.Start () { return 1; }
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public int Stop () { return 2; }
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public virtual int Turn () { return 3; }
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}
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public class Derived1 : Base {
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// replaces Base.Turn + IVehice.Turn
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public override int Turn () { return 4; }
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}
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public class Derived2 : Base, IVehicle {
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// legal - we redeclared IVehicle support
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public new int Stop () { return 6; }
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// legal - we redeclared IVehicle support
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int IVehicle.Start () { return 5; }
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// replaces IVehicle.Turn
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int IVehicle.Turn () { return 7; }
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// replaces Base.Turn
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public override int Turn () { return 8; }
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}
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public class Test {
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public static int Main () {
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Derived1 d1 = new Derived1 ();
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Derived2 d2 = new Derived2 ();
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Base b1 = d1;
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Base b2 = d2;
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if (d1.Turn () != 4)
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return 1;
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if (((IVehicle)d1).Turn () != 4)
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return 2;
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if (((IVehicle)d2).Turn () != 7)
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return 3;
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if (b2.Turn () != 8)
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return 4;
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if (((IVehicle)b2).Turn () != 7)
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return 5;
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//Console.WriteLine ("TEST {0}", ((IVehicle)b2).Turn ());
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return 0;
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}
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}
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