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// FILE: point.h
// CLASS PROVIDED: point (part of the namespace main_savitch_chapter2)
//
// CONSTRUCTOR for the point class:
// point(double initial_x = 0.0, double initial_y = 0.0)
// Postcondition: The point has been set to (initial_x, initial_y).
//
// MODIFICATION MEMBER FUNCTIONS for the point class:
// void shift(double x_amount, double y_amount)
// Postcondition: The point has been moved by x_amount along the x axis
// and by y_amount along the y axis.
//
// void rotate90( )
// Postcondition: The point has been rotated clockwise 90 degrees around
// the origin.
//
// CONSTANT MEMBER FUNCTIONS for the point class:
// double get_x( ) const
// Postcondition: The value returned is the x coordinate of the point.
//
// double get_y( ) const
// Postcondition: The value returned is the y coordinate of the point.
//
// VALUE SEMANTICS for the point class:
// Assignments and the copy constructor may be used with point objects.
#ifndef MAIN_SAVITCH_POINT_H
#define MAIN_SAVITCH_POINT_H
namespace main_savitch_2A
{
class point
{
public:
// CONSTRUCTOR
point(double initial_x = 0.0, double initial_y = 0.0);
// MODIFICATION MEMBER FUNCTIONS
void shift(double x_amount, double y_amount);
void rotate90( );
// CONSTANT MEMBER FUNCTIONS
double get_x( ) const { return x; }
double get_y( ) const { return y; }
private:
double x; // x coordinate of this point
double y; // y coordinate of this point
};
}
#endif
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