题目内容

阅读以下程序class A{public virtual void G(){Console.Write(“A”);}}class B:A{new private void G(){Console.Write(“B”);}}class C:B{public override void G(){Console.Write(“C”);}}class Test{static void Main(){A a = new A();B b = new B();C c = new C();A d = c;a.G();b.G();c.G();d.G();}}以上程序运行后的结果是（）

ABCC
B. ABCA
C. ABCB
D. ABBC

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阅读以下程序class A{public virtual void G(){Console.Write(“A”);}}class B:A{public virtual void G(){Console.Write(“B”);}}class C:B{public override void G(){Console.Write(“C”);}}class Test{static void Main(){A a = new A();B b = new B();C c = new C();A d = c;a.G();b.G();c.G();d.G();}}以上程序以下后的结果是（）

ABCC
B. ABCB
C. ABCA
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阅读以下程序class A{public virtual void G(){Console.Write(“A”);}}class B:A{public override void G(){Console.Write(“B”);}}class C:B{new public virtual void G(){Console.Write(“C”);}}class D:C{public override void G(){Console.Write(“D”);}}class Test{static void Main(){D d = new D();A a = d;B b = d;C c = d;a.G();b.G();c.G();d.G();}}以上程序运行后的输出结果是（）

ABCD
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阅读以下程序class A{public virtual string Name(){get{ return “A”;}}}class B:A{public override string Name(){get{ return “B”;}}}class Test{static void Main(){A a = new A();B b = new B();A c = b;Console.Write(a.Name);Console.Write(b.Name);Console.Write(c.Name);}}以上程序运行后的输出结果是（）

AAA
B. AAB
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阅读以下程序class A{public string Name(){get{ return “A”;}}}class B:A{new public string Name(){get{ return “B”;}}}class Test{static void Main(){A a = new A();B b = new B();A c = b;Console.Write(a.Name);Console.Write(b.Name);Console.Write(c.Name);}}以上程序运行后的输出结果是（）

AAA
B. AAB
C. ABA
D. ABB