p0 = p1;
p1 = p2;
p2 = p4;
p2 = (ClassC)p1;
p1 = (ClassB)p3;
p2 = (ClassC)p4;
第1题:
A.p0 = p1;
B.p1 = p2;
C.p2 = p4;
D.p2 = (ClassC)p1;
E.p1 = (ClassB)p3;
F.p2 = (ClassC)p4;
第2题:
下面程序段的输出结果为 package test; public class ClassA { int x=20; static int y=6; public static void main(String args[]) { ClassB b=new ClassB(); b.go(10); System.out.println("x="+b.x); } } class ClassB { int x; void go(int y) { ClassA a=new ClassA(); x=a.y; } }
A.x=10
B.x=20
C.x=6
D.编译不通过
第3题:
A.classA{publicA(intx){}}
B.classA{}classBextendsA{B(){}}
C.classA{A(){}}classB{publicB(){}}
D.classZ{publicZ(int){}}classAextendsZ{}
第4题:
有以下源程序: package test; public class ClassA { int x=20; static int y=6; public static void main(String args[]) { ClassB b=new ClassB(); b.go(10); System.out.println("x="+b.x); } } class ClassB { int x; void go(int y) { ClassA a=new ClassA(); x=a.y; } } 上述源程序文件的运行结果为( )。
A.x=10
B.x=20
C.x=6
D.编译不通过
第5题:
下面程序段的输出结果为( )。 package test; public class ClassA { int x=20: static int y=6; public static void main(String args[]) { ClassB b=new ClassB; go(10); System.out.println("x="+b.x); } } class ClassB { int X; void go(int y) { ClassA a=new ClassA; x=a.Y ; } }
A.x=10
B.x=20
C.x=6
D.编译不通过
第6题:
A.Compilation fails.
B.ClassC is displayed.
C.The code runs with no output.
D.An exception is thrown at runtime.
第7题:
下面程序输出的结果为 #include"iostream.h" class A { public: A(){cout<<"CLASSA"<<endl;} ~A() {} }; class B:public A { public: B(){cout<<"CLASSB"<<endl;} ~B() {} }; void main() { A * p; p=new B; B *q; q=new B; }
A.CLASS A CLASS B
B.CLASS A CLASS B CLASS B
C.CLASS A CLASS B CLASS A CLASS B
D.CLASS A CLASS B CLASS B CLASS B
第8题:
A.ClassB’sconstructorispublic.
B.ClassB’sconstructorhasnoarguments.
C.ClassB’sconstructorincludesacalltothis().
D.ClassB’sconstructorincludesacalltosuper().
第9题:
下面程序输出的结果为( )。 #include"iostream.h" classA {public: A(){cOUt<<"CLASSA"<<endl;} ~A(){}}; ClaSSB:publicA {public: B(){cout<<"CLASSB"<<endl;} ~B(){}}; voidmain() {A*P; P=newB: B*q: q=newB;}
A.CLASSA
B.CLASSA CLASSBCLASSB CLASSB
C.CLASSA
D.CLASSA CLASSBCLASSB CLASSACLASSB CLASSBCLASSB
第10题:
下面程序输出的结果为( )。
#include"iostream.h"
classA
{public:
A(){cOUt<<"CLASSA"<<endl;}
~A(){}};
ClaSSB:publicA
{public:
B(){cout<<"CLASSB"<<endl;}
~B(){}};
voidmain()
{A*P;
P=newB:
B*q:
q=newB;}
A.CLASSB
B.CLASSA CLASSB CLASSB
C.CLASSA CLASSB CLASSA CLASSB
D.CLASSA CLASSB CLASSB CLASSB