Integer Points ( IPoint )

Definition

An instance ip of type IPoint is a point (a, b), where a and b are integers. We call a the x-coordinate of ip and b the y-coordinate of ip.

#include < AGD/IPoint.h >

Creation

IPoint	ip	creates an instance ip of type IPoint initialized to the point (0, 0).
IPoint	ip(int x, int y)	creates an instance ip of type IPoint initialized to the point (x, y).
IPoint	ip(const IPoint& p)	creates an instance ip of type IPoint initialized to the point p.

Operations

int	ip.xcoord()	returns the x-coordinate of ip.
int	ip.ycoord()	returns the y-coordinate of ip.
void	ip.xcoord(int x)	sets the x-coordinate of ip to x.
void	ip.ycoord(int y)	sets the y-coordinate of ip to y.
IPoint&	ip.inc_x(int dx)	increments the x-coordinate of ip by dx. Returns a reference to ip.
IPoint&	ip.inc_y(int dy)	increments the y-coordinate of ip by dy. Returns a reference to ip.
bool	ip == const IPoint& p	Test for equality.
bool	ip != const IPoint& p	Test for inequality.
IPoint	ip + const IPoint& ip1	returns the addition (of coordinates).
IPoint	ip - const IPoint& ip1	returns the subtraction (of coordinates).
IPoint&	ip += const IPoint& ip1	adds ip1 to ip. Returns a reference to ip.
IPoint&	ip -= const IPoint& ip1	subtracts ip1 from ip. Returns a reference to ip.
IPoint	int x * const IPoint& ip	returns the multiplication of dp with the scalar x.
ostream&	ostream& O << const IPoint& ip
		writes ip to output stream O.
istream&	istream& I >> IPoint& ip	reads the coordinates of ip (two int numbers) from input stream I.