Further cleaning up of class examples

Examples/modula3/class/example.h

@@ -1,44 +1,34 @@
 /* File : example.h */
 
-class Shape
-{
+class Shape {
 public:
-  Shape ()
-  {
+  Shape() {
     nshapes++;
   }
-  virtual ~ Shape ()
-  {
+  virtual ~Shape() {
     nshapes--;
-  };
-  double x, y;
-  void move (double dx, double dy);
-  virtual double area (void) const = 0;
-  virtual double perimeter (void) const = 0;
-protected:
-  static int nshapes;
+  }
+  double  x, y;
+  void    move(double dx, double dy);
+  virtual double area() = 0;
+  virtual double perimeter() = 0;
+  static  int nshapes;
 };
 
-class Circle:public Shape
-{
+class Circle : public Shape {
 private:
   double radius;
 public:
-    Circle (double r):radius (r)
-  {
-  };
-  virtual double area (void) const;
-  virtual double perimeter (void) const;
+  Circle(double r) : radius(r) { }
+  virtual double area();
+  virtual double perimeter();
 };
 
-class Square:public Shape
-{
+class Square : public Shape {
 private:
   double width;
 public:
-    Square (double w):width (w)
-  {
-  };
-  virtual double area (void) const;
-  virtual double perimeter (void) const;
+  Square(double w) : width(w) { }
+  virtual double area();
+  virtual double perimeter();
 };