已定义一个圆的类Circle: class Circle{private: double r;public:void SetR(double x) { r = x; }double GetArea( ) { return 3.14*r*r; }}; 下列语句中正确的是( )。
A、Circle c, *p = &c; p.SetR(10.5); p.GetArea( );
B、Circle c, *p = c; p->SetR(10.5); p->GetArea( );
C、Circle c, *p = &c; p->SetR(10.5); p->GetArea( );
D、Circle c, *p = &c; p->GetArea( );