ex1502.cpp

teach yourself C++ in 21 days 第五版

  // Ex1502.cpp
  #include <iostream>
  using namespace std;
  class myClass
  {
    public:
      myClass();
      ~myClass();
      void ShowMember();
      void ShowStatic();
    private:
      int itsMember;
      static int itsStatic;
 };

  myClass::myClass():
  itsMember(1)
  {
     itsStatic++;
  }

  myClass::~myClass()
  {
     itsStatic--;
     cout << "In destructor. ItsStatic: " << itsStatic << endl;
  }

  void myClass::ShowMember()
  {
     cout << "itsMember: " << itsMember << endl;
  }

  void myClass::ShowStatic()
  {
     cout << "itsStatic: " << itsStatic << endl;
  }
  int myClass::itsStatic = 0;

  int main()
  {
     myClass obj1;
     obj1.ShowMember();
     obj1.ShowStatic();

     myClass obj2;
     obj2.ShowMember();
     obj2.ShowStatic();

     myClass obj3;
     obj3.ShowMember();
     obj3.ShowStatic();
   return 0;
  }