有如下程序: #included<iostream> usingnamespacestd; classA{ public: virtualvoidfuncl(){cout<<"A1";) voidrune2(){cout<<"A2";}}; classB:publicA{ public: voidfuncl(){cout<<:"B1";} voidfunc2(){eout<<"B2";}}; intmain(){ A*p=newB; p->func1(); P->func2(); return0;} 执行该程序,屏幕上将显示输出( )。
A.B1B2
B.A1A2
C.B1A2
D.A1B2
第1题:
有如下程序: #include<iostream> using namespace std; classA { public: A(){cout<<"A";} }; class B{public:B(){cout<<"B";}}; class C:public A { B b; public: C(){cout<<"C";} }; int main(){C obj;return 0;} 执行后的输出结果是( )
A.ABC
B.BAC
C.ACB
D.CBA
第2题:
请将如下程序补充完整,使得输出结果为:bbaa
include <iostream>
using namespace std;
class A {
public:
【 】{cout << "aa"; }
};
class B: public A{
public:
~B(){ cout << "bb"; }
};
int main () {
B *p= new B;
delete p;
return 0;
}
第3题:
有如下程序:
include<iostream>
using namespace std;
class A
{
public:
virtual void f(){cout<<"1";}
};
class B:public A
{
public:
B (){cout<<"2";}
};
class C:public B
{
public:
virtual void f(){B::f();cout<<"3";}
};
int main()
{
A aa,*p;
B bb;
C cc;
p=&cc;
p->f();
return 0;
}
执行上面程序的输出是______。
第4题:
有如下程序: #include<iostream> using namespace std; class A{ public: A(){cout<<"A";} }; classB{public:B().{cout<<"B";}} classC:public A{ B b; public: C(){cout<<"C";} }; int main (){ C obj; return 0;} 执行后的输出结果是
A.CBA
B.BAC
C.ACB
D.ABC
第5题:
有如下程序: #include<iostream> using namespace std; class A { public: A(){cout<<"A";} }; class B{public:B(){cout<<"B";} }; class C:public A { B b; public:C(){cout<<"C";} }; int main() { C obj; return 0; } 执行后的输出结果是( )。
A.CBA
B. BAC
C.ACB
D.ABC
第6题:
下面程序的运算结果是( )。 #include<iostream> using namespace std; class A { public: virtual void fun()=0; }; class B:public A } public: void fun() {cout<<"new file"<<" ";} }; class C:public A { public: void fun() { cout<<"open file"<<" ";} }; void main() { A a, * p; B b;C c; p=&c; p->fun(); p=&b; }
A.new file open file
B.new file new file
C.编译出错
D.open file new file
第7题:
如下程序的输出结果是 #include<iostream> using namespace std; class A{ public: A( ){cout<<"A";} }; class B{public:B( ){cout<<"B";}}; class C:public A{ B b; public: C( ){cout<<"C";} }; int main( ){C obj;return 0;}
A.CBA
B.BAC
C.ACB
D.ABC
第8题:
有如下程序: #include<iostream> using namespace std; class A { public: A(){cout<<"A";} }; class B<public:B(){cout<<"B";)); class C:public A { B b; public: C(){cout<<"C";} }; int main(){Cobj;retum 0;} 执行后的输出结果是
A.CBA
B.BAC
C.ACB
D.ABC
第9题:
有如下程序: #include <iostream> using namespace std; class A { public: A() {cout<<"A";} }; class B {public:B() {cout<<"B";}}; class C: public A { Bb; public: C() {cout<<"C";} }; int main() {C obj;return 0;}执行后的输出结果是 ______。
A.CBA
B.BAC
C.ACB
D.ABC
第10题:
有如下程序: #include<iostream> using namespace std; class A { public: A(){cout<<"A";} }; classB{public:B(){cout<<"B";}} classC:public A{ B b; public: C(){cout<<"C";} }; int main(){ C obj; return 0;} 执行后的输出结果是( )。
A.CBA
B.BAC
C.ACB
D.ABC