8-16.cpp

来自「为C++学习者」· C++ 代码 · 共 31 行

#include<iostream.h>
class aClass
{
  static int total;
public:
  aClass()
  { total++;}
  ~aClass()
  { total--;}
  int gettotal()
  { return total;}
};
int aClass::total=0;
main()
{
  aClass o1,o2,o3;
  cout<<o1.gettotal()<<" objects in existence\n";
  aClass *p;
    p=new aClass;
  if(!p)
  {
    cout<<"Allocation erroe\n";
	return 1;
  }
  cout<<o1.gettotal();
  cout<<" object in existence after allocation\n";
  delete p;
  cout<<o1.gettotal();
  cout<<" object in existence after deletion\n";
  return 0;
}