以下程序的执行结果为______。
include<iostream.h>
class A
{public:A(){cout<<“a”;}
~A(){cout<<“b”;}};
class B:public A
{public:
B(){cout<<“c”;)
~B(){cout<<“d”;}};
void main()
{B b;}
第1题:
有如下程序: #include<iostream.h> using namespace std; Class Base { public: Base(){cout<<“BB”;f();} void{(){cout<<“BF”;} }; class Derived:public Base { public: Derived(){cout<<“DD”;} void f(){cout<<“Df”;) }; int main
A.BBBfDD
B.BBDfDDDf
C.DD
D.DDBBBf
第2题:
下面程序的结果是 #include<iostream.h> class A { public: A(){cout<<"construtA" <<endl;} virtual ~A() {cout << "destructA" <<endl;}}; class B:public A { }; class C:public A { }; class D:public B,public C { }; void main() { Dd;}
A.constructA
B.constructA
C.constmctA
D.constmctA destructA constructA constmctA constructA destructA constructA constructA destructA destructA constructA destructA dest
第3题:
在下面程序的横线处填上适当的语句,使程序执行后的输出结果为ABCD。
include<iostream>
using namespace std;
classA
{
public:
A(){cout<<'A';}
};
class B:______
{
public:
B(){cout<<'B';}
};
class C:______
{
public:C(){cout<<'C';}
};
class D:public B,public C
{
public:D(){cout<<'D';}
};
void main(){D obj;)
第4题:
下面程序的结果是 #include<iostream.h> class A { public: A( ) {cout<<"construtA"<<endl;} virtual~A( ) {cout<<"destructA"<<endl;}}; class B:public A {}; class C:public A {}; c
A.constructA destructA
B.constructA constructA destructA destructA
C.constructA constructA constructA destructA destructA destructA
D.constructA onstructA constructA constructA destructA destructA destructA destructA
第5题:
下面程序的运行结果是( )。 #include<iostream.h> class base{ protected: int a; public: base(){cout<<“0”;} }; Class basel:Virtual base{ public: basel(){cout<<“1”;} }; Class base2:virtual base{ public: base2(){cout<<“2”;)
A.0123
B.3120
C.0312
D.3012
第6题:
以下程序的执行结果为______。
include<iostream>
using namespace std;
class base
{
public:
virtual void who()
{
cout<<"base class"<<endl;
}
};
class derivel:public base
{
public:
void who()
{
cout<<"d
第7题:
在下面程序的画线处填上适当的内容,使程序执行后的输出结果为ABCD。
include <iostream>
using namespace std;
class A{
public:A( ){cout<<'A';}
};
class B: (11) {
public:B( ){cout<<'B';}
{;
class C: (12) {
public:C( ){cout<<'C';}
};
class D:public B,public C{
public:D( ){cout<<'D';}
};
void main( ){
D( );
cout<<endl;
}
第8题:
下面程序的运行结果是
#include<iostream.h>
class base{
protected:
int a;
public:
base( ) {cout < < "0";}
};
class base l: virtual base{
public:
base l ( ) {cout < <"1";}
};
class base 2: virtual base{
public:
base2 ( ) {cout < <"2";}
};
class derived: public base 1, public base2{
public:
derived( ) {cout < < "3";}
};
void main( )
{
derive obj;
cout < < endl;
}
A.0123
B.3120
C.0312
D.3012
第9题:
下列程序的运行结果是______。
include<iostream.h>
class A
{
public:
virtual void use( ) {cout<<"in A\n";}
};
class B:public A
{
public:
virtual void use( ) {cout<<"in B\n";}
};
class C:public B
{
public:
virtual void use( ){cout<<"in C\n";}
};
void main( )
{
A*obj;
bj=new C;
obj->use( );
delete obj;
}
第10题:
有如下程序: #include <iostream.h> using namespace std; class Base { public: Base(){ cout<<"BB"; f(); } voidf(){cout <<"Bf"; } }; class Derived: public Base { public: Derived (){cout<<"DD";} void f(){cout<<"Df";} }; int main(){Derived d; return 0;} 执行上面的程序将输出
A.BBBfDD
B.BBDfDDDf
C.DD
D.DDBBBf