答案及解析：[单选题]已定义一个圆的类Circle: class Circle { private: double r; public: void SetR(double x) { r = x; } double GetA

问题：

[单选题]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( )。

ACircle c, *p = &c; p.SetR(10.5); p.GetArea();

BCircle *p; p->SetR(10.5); p->GetArea();

CCircle *p; p = new Circle; p->SetR(10.5); p->GetArea(); delete p;

DCircle *p = new Circle; p->SetR(10.5); p->GetArea(); delete [ ]p;

答案解析：

╋纠错

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