C#编程高手帮忙解答下这道练习题
三,[理解问答题]阅读下面的程序,写出程序运行的结果,并给以简单扼要的说明。//********************************************************** *****/
#include
class Cla_Base {
private:
//...其他成员
public:
virtual void fun_Disply(long num) {cout << "class Cla_Base: " << num << endl; }
void fun_Disply (char * str) { cout << "class Cla_Base: " << str << endl ; }
void fun_Disply () { cout << "Disply in class Cla_Base without parameter!\n" ; }
};
class Cla_Sub: public Cla_Base {
private:
static int obj_n;
//...其他成员
public:
Cla_Sub() { obj_n ++; }
~Cla_Sub() { obj_n --; }
static int GetObj_n() { return obj_n; };
void fun_Disply (long num) { cout << "class Cla_Sub: " << num << endl ; }
void fun_Disply (char * str) { cout << "class Cla_Sub: " << str << endl ; }
void fun_Disply () { cout << "Disply in class Cla_Sub without parameter!\n"; }
};
int Cla_Sub::obj_n = 0;
void main(int argc, char* argv[])
{
Cla_Base *pBase;
Cla_Sub Sub1,*pSub = new Cla_Sub[5];
pBase = &Sub1;
pBase-> fun_Disply ("Hello!");
pBase-> fun_Disply (2000);
pBase-> fun_Disply ();
pSub-> fun_Disply ("Hi!");
pSub-> fun_Disply ();
cout<<"There are "<GetObj_n()<<" objects"< delete []pSub;
cout<<"There are "<