下面程序的运行结果是 ______。includeclass A{public virtual、~(){cout 下面程序的运行结果是 ______。 #include<iostream.h> class A{ public virtual、~(){ cout<<”call A:: ~A()”<<end1;} }; class B:public A{ B(int i){p=new char[i]:} -B(){ delete[)p; Cout<<”call B:: ~B()”; } }; void main() { A*a=new B(8); Delete a; }A.call B:: ~B()B.call B:: ~B()C.call A:~A()D.call A::~A()
下面程序的运行结果是 ______。includeclass A{public virtual、~(){cout<<”call A::
下面程序的运行结果是 ______。 #include<iostream.h> class A{ public virtual、~(){ cout<<”call A:: ~A()”<<end1;} }; class B:public A{ B(int i){p=new char[i]:} -B(){ delete[)p; Cout<<”call B:: ~B()”; } }; void main() { A*a=new B(8); Delete a; }
A.call B:: ~B()
B.call B:: ~B()
C.call A:~A()
D.call A::~A()
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下面程序的运行结果是 include class base{ protected: int a; public: base( ) {c 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.0123B.3120C.0312D.3012
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下面程序的运行结果是()。includeclass base{protected:int a;public:base(){cout 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.0123B.3120C.0312D.3012
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下面程序的输出结果是includeclass A{public: A( ) {cout 下面程序的输出结果是 #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( ) { D d;}A.constructAB.constructAC.constructAD.constructA destructA constructA constructA constructA destructA constructA constrnctA destructA destructA constructA destructA destructA destructA destrctA destructA destructA
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下面程序的结果是 ______。includeclass A{ public:virtual voidfun()=0{};};class 下面程序的结果是 ______。 #include<iostream.h> 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"<< " " } }; class D: public A{ public: void fun () {cout<< "save file\n" ;} }; void main() { A a,*p; B b; C c; D d; p=c; p->fun (); p=b; p->fun (); p=d; p->fun(); }A.new file open file save fileB.new file new file new fileC.编译出错D.open file new file save file
下面程序的运行结果是includeclass base{protected: int a;public: base(){cout 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";} }; class derived:public basel,public base2{ public: derived(){cout <<"3";} }; void main() { derived obj; cout <<end1; }A.123B.3120C.312D.3012
下面程序的运行结果是()。includeusing namespace std;class A{public: virtual~A() { 下面程序的运行结果是( )。 #include<iostream> using namespace std; class A { public: virtual~A() { cout<<"call A::~A()"<<endl;} }; class B:public A { char * p; public: B(int i) { p=new char[i];} ~B() { delete(p); cout<<"call B::~B()"; } }; void main() { A * a=new B(8); delete a; }A.call B::~B()call A::~A()B.call B::~B()C.call A::~A()D.call A::~A()call B::~B()