1
class Point
{
private:
int X, Y;
public:
static const Point Origin;
static const Point OneZero;
static const Point ZeroOne;
};
我如何访问点起源?如何访问静态类成员?
class Point
{
private:
int X, Y;
public:
static const Point Origin;
static const Point OneZero;
static const Point ZeroOne;
};
我如何访问点起源?如何访问静态类成员?
为静态,写:
Point::Origin
或更完整的示例:
namespace Someplace {
int fun() {
return Point::Origin.X;
}
}
虽然资格Point::
是没有必要的时候类范围内 - 你可以简单地写Origin
。
添加存取( “干将”)将类,如下所示:
class Point
{
private:
int X, Y;
public:
static const Point Origin;
static const Point OneZero;
static const Point ZeroOne;
int getX() {return X;}
int getY() {return Y;}
};
然后你就可以访问点的内容是这样的:
int originX = Origin.getX();
或者这样:
Point myPoint;
int pointX = myPoint.getX();
另外,令人困惑的是Point类中存在类Point的静态实例。以下可能更多你想要做什么:
class Point
{
public:
// Added a constructor that takes two arguments
Point(int pointX, int pointY) {X = pointX; Y = pointY;}
int getX() {return X;}
int getY() {return Y;}
private:
int X, Y;
};
int main()
{
const Point Origin(0,0);
const Point OneZero(1,0);
const Point ZeroOne(0,1);
int originX = Origin.getX();
};
添加getters访问私人会员。 'getX()'和'int getY()' – andre 2013-02-28 16:16:41
ADD类的方法如:'getX(){return this-> x}' – 2013-02-28 16:16:46
“access”是什么意思?我也希望我可以减少评论。 – 2013-02-28 16:17:14