c++，在RMB类中加入一个静态数据成员countR，用于对RMB对象计数，同时写出能返回countR的静态函数成员Getcount R（），并在main函数中测试，报错了不知道该怎么改错

#include using namespace std;class RMB{private: int yuan, jiao, fen; static int countR();public: static int GetcountR(); RMB(int y, int j, int f) { yuan = y; jiao = j; fen = f; } RMB(double x) { yuan = x * 100 / 100; jiao = (x - yuan) * 100 / 10; fen = (x10-yuan10-jiao)*10; } void Getdouble() { cout << yuan + jiao * 0.1 + fen * 0.01 << "元" << endl; } void Getint() { cout << yuan << "元" << jiao << "角" << fen << "分" << endl; }};int RMB::countR=0;int RMB::GetcountR(){ countR++; GetcountR=countR; return GetcountR;}int main(){ cout<<"对象个数:"<<RMB::GetcountR()<<endl; RMB(5, 2, 6); RMB(3.25); RMB(5, 2, 6).Getdouble(); RMB(3.25).Getint(); return 0;}