有如下类和对象的定义:    class Constants{    public:      static double get PI(){return 3.1416;}    };    Constants constants;    下列各组语句中,

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问题 有如下类和对象的定义:    class Constants{    public:      static double get PI(){return 3.1416;}    };    Constants constants;    下列各组语句中,能输出3.1416的是

选项 A、cout<<constants->getPI();和cout<<Constants::getPI();
B、cout<<constants. getPI();和cout<<Constants.getPI();
C、cout<<constants->getPI();和cout<<Constants->getPl();
D、cout<<constants. getPI();和cout<<Constants::getPI();

答案D

解析
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