下列程序运行结果是 。class A{public:virtual void funcl(){cout&#91;< "A1";}void func2(){cout<< "A2";}};class B: public A{public:void func1(){cout<< "B1";}void func2(){cout<< "B2";}};int main(){A *p=new B;p-&#93;funcl();p->func2();return 0;}

class Count {public int count;public Count（int c） {count = c;}public Count（）{count = 1;}}public class Test {public static void increment（Count c, int times） {c.count++;times++;}public static void main A: myCount.count=4 times=0 B: myCount.count=4 times=1 C: myCount.count=3 times=1 D: myCount.count=3 times=0

有以下类定义： class A{int x;};class B:virtual public A{int y;};class C:virtual public A{int z;};class D:public B, public C{};则对于 D 类对象 d，以下正确的选项是（ ）。 A: 有 3 个成员 B: 有 4 个成员 C: 没有成员 D: 有 2 个成员

Which two allow the class Thing to be instantiated using new Thing（）？ A:  public class Thing { } B:  public class Thing { public Thing（） {} } C:  public class Thing { public Thing（void） {} } D:  public class Thing { public Thing（String s） {} } E:  public class Thing { public void Thing（） {} public Thing（String s） {} }

下列哪个方法可用于创建一个可运行的类（） A: public class X implements Runnable{public void run() {……}} B: public class X extends Thread{public void run() {……}} C: public class X extends Thread{public int run() {……}} D: public class X implements Runnable{protected void run() {……}}