555

#include using namespace std;   class cat{   public:     cat()     {       numOfCats++;     }     static int getNumOfCats()     {       return numOfCats;     }     ~cat()     {       numOfCats--;     }   private:     static int numOfCats; }; int cat::numOfCats = 0; //类的静态成员变量必须在类外进行初始化   void numprintf() { cout<<"There are "<