#include<iostream.h>
#include<string.h>
 class student
{
 public:
  student(char *s,int t=80);
  student(student &p);
  ~student();
  void display(void);
  static void get_count(void);//靜態成員函數
 private:
  char *name;
  int score;
  static int count;	//靜態數據成員
}; 
 student::student(char *s,int t)
{
  name=new char[strlen(s)+1];
  strcpy(name,s);
  score=t;
  count++;
  cout<<"新增加一個學生"<<endl;
}
 student::student(student &p)
{
  name=new char[strlen(p.name)+1];
  score=p.score;
}
 student::~student()
{
  delete[]name;
  count--;
  cout<<"減少一個學生"<<endl;
  get_count();//調用靜態成員函數
}
 void student::display(void)
{
  cout<<"count="<<count<<endl;
  cout<<"姓名："<<name<<" 成績："<<score<<endl;
}
 void student::get_count(void)
{
  cout<<"count="<<count<<endl;
}
 int student::count=0;	//靜態數據成員定義
 int main()	
{
  student::get_count();	//輸出學生總數
  student a("劉德華",82);//定義對象a
  a.display();
  student b("李昌鎬");//定義對象b
  b.display();
  a.get_count();
  cout<<"對象a的長度是："<<sizeof(a)<<endl;
  return(0);
}