[c-prog] what is Point &operator=( Point p) do ???

[duongthaiha]

Hi sorry for a new bee question. I have the following code but there
is something that i can not understand what does it do.

Can you please tell me what does "Point &operator=( Point p)" does?
 
I think that the a overwrite the = operator but should it return bool
instead of Point??

Thanks a lot in advance.

Best regard


class Point {
    public:  
        double x;
        double y; 
        double z;
        double thickness;
        
        Point(double xx=0,double yy=0,double zz=0,double tn=0){
              x=xx;
              y=yy;
              z=zz;
              thickness=tn;
    }
    
    Point(const Point& obj){
                x=obj.x;
                y=obj.y;
                z=obj.z;
                thickness=obj.thickness;
    }
    
        Point &operator=( Point p) { // Right side is the argument.
              x=p.x;
              y=p.y;
              z=p.z;
              thickness=p.thickness;
    }
};