1 files changed, 33 insertions, 0 deletions
diff --git a/chapter2/point.cxx b/chapter2/point.cxx
new file mode 100644
index 0000000..9b56f9e
--- /dev/null
+++ b/chapter2/point.cxx
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+// FILE: point.cxx
+// CLASS IMPLEMENTED: point (See point.h for documentation.)
+
+#include "point.h"
+
+namespace main_savitch_2A
+{
+    
+    point::point(double initial_x, double initial_y)
+    {
+        x = initial_x;   // Constructor sets the point to a given position.
+        y = initial_y;
+    }
+
+    
+    void point::shift(double x_amount, double y_amount)
+    {
+        x += x_amount;
+        y += y_amount;   
+    }
+
+    
+    void point::rotate90( )
+    {
+        double new_x;
+        double new_y;
+
+        new_x = y;  // For a 90 degree clockwise rotation, the new x is the original y,
+        new_y = -x; // and the new y is -1 times the original x.
+        x = new_x;
+        y = new_y; 
+    }
+}