写出程序运行的结果

Public class Base

Public virtual string Hello() {return “Base”;}

Public class Sub:Base

Public override string Hello() {return “Sub”;}

1. Base b = new Base(); b.Hello;

2. Sub s = new Sub(); s.Hello;

3. Base b = new Sub (); b.Hello;

4. Sub s = new Base(); s.Hello;

[主观题]写出程序的输出结果：public class A{public virtual void Fun1(int i){C．onsole.WriteLine(i);}public void Fun2(A a){a.Fun1(1);F．un1(5);}}public class B : A{public override void Fun1(int i){base.Fun1 (i + 1);}public static void Main(){B． b = new B();A． a = new A();

[单选题]以下程序的运行结果为( )。 public class Sun { public static void main(String args[]) { String x="A"，y="B"，z="C"； for(int m=1；m＜=2；m++) { x=y； y=z； z=x； } System.out.println(x+y+z)； } }A．ABCB．BCAC．BCBD．CBC

[单选题]以下程序的运行结果为( )。 public class Sun { public static void main(String args[ ]) { String x="A",y="B",z="C"; for(int m=1;m＜=2;m++) { x=y; y=z; z=x; } System.out.println(x+y+z); } }A．ABCB．BCAC．BCBD．CBC

[单选题]下面程序的运行结果是( )。 public class Test { public static void main (String args[]) { int c=5； System. out. println (C)； System. out. println (c++)； System. out. println (C)； } }A．5 6 6B．5 5 6C．6 7 7D．6 6 6

[主观题]写出程序的输出结果public abstract class A{public A(){C．onsole.WriteLine('A');}public virtual void Fun(){C．onsole.WriteLine("A.Fun()");}}public class B: A{public B(){C．onsole.WriteLine('B');}public new void Fun(){C．onsole.WriteLine("B.Fun()");}public s

[主观题]写出程序的输出结果public abstract class A{public A(){C．onsole.WriteLine('A');}public virtual void Fun(){C．onsole.WriteLine("A.Fun()");}}public class B: A{public B(){C．onsole.WriteLine('B');}public new void Fun(){C．onsole.WriteLine("B.Fun()");}public s

[单选题]下列程序的运行结果是( )。 public class Sun { public static void main(String args[ ]) { int number,digits; number=53; if(number＜10) digits=1; else if(number＜100) digits=2; else diglts=3; System.out.println(digits); } }A．1B．2C．3D．0

[试题]下列程序的运行结果是[ ]。public class Test {public static void main (String args[]) {String s1＝"hello!"；System.out.println (s1.toUpperCase())；}}

[单选题]下列程序运行的结果是( )。public class Test { public static void main(String[] args) { int a=2,b=3; System.out.println( (a＞b?" *** a =" :" ###b = ") + A) ; } }A．*** a=2B．*** a=3C．### b=2D．### b=3

[单选题]下列程序的运行结果是( )。 public class Sun { public static void main(String args[ ]) { int number,digits; number=53; if(number＜10) digits=1; else if(number＜100) digits=2; else digits=3; System.out.println(digits); } }A．1B．2C．3D．0