I have the following class:
class Point2D
{
protected:
double x;
double y;
public:
double getX() const {return this->x;}
double getY() const {return this->y;}
...
有时候我需要返回x坐标,有时候我需要返回y坐标,所以我使用指向成员函数getX()、getY()的指针。但是我无法返回坐标,请看下面的代码:
};
double ( Point2D :: *getCoord) () const;
class Process
{
......
public processPoint(const Point2D *point)
{
//Initialize pointer
if (condition)
{
getCoord = &Point2D::getX;
}
else
{
getCoord = &Point2D::getY;
}
//Get coordinate
double coord = point->( *getCoordinate ) (); //Compiler error
}
}
感谢您的帮助。