1 files changed, 49 insertions, 0 deletions
diff --git a/chapter2/point.h b/chapter2/point.h
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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