using namespace std;
class Point
{
public:
double x;
double y;
Point(){}
void setPoint(double x,double y )
{
this->x = x;
this->y = y;
}
Point(double xx,double yy)
{
this->x=xx;
this->y=yy;
}
};
class Point1
{
public:
Point point;
void set()
{
point.x=;
point.y=;
cout<<point.x<<point.y<<endl;
}
};class Point2
{
public:
Point point;
void set(Point point)
{
point.x=;
point.y=;
cout<<point.x<<point.y<<endl;
}
};
class Point3
{
public:
Point point;
void set(Point &point)
{
point.x=;
point.y=;
cout<<point.x<<point.y<<endl;
}
};int main(int argc,char *argv[])
{
Point1 point1;
point1.set();
cout<<point1.point.x<<point1.point.y<<endl;
Point2 point2;
point2.set(point2.point);
cout<<point2.point.x<<point2.point.y<<endl;
Point3 point3;
point3.set(point3.point);
cout<<point3.point.x<<point3.point.y<<endl;
return ;
}
c++中要想让内部操作印象到外部,需要使用引用或者指针。
java中将摒弃指针,全部使用引用进行操作。