下列程序的输出结果为: bjectid=O biectid=1 请将程序补充完整。 include<iostream> using namespace std; class Point { public: Point(int xx=0,int yy=0){X=xx;Y=yy;countP++;} ~Point(){countP--;} int GetX(){return X;} int GetY(){return Y;} static void GetC(){cout<<'Object id='<<countP<<endl;} private: int X,Y; static int countP; }; ______//静态数据成员的初始化 int main() { Point::GetC(); Point A(4,5); A.GetC(); return 0; }