point2.h

经典的<<C how to program>一书第三版的例程。非常适合于C的初学者。

// Fig. 19.8: point2.h
// Definition of class Point
#ifndef POINT2_H
#define POINT2_H

#include <iostream>

using std::ostream;

class Point {
   friend ostream &operator<<( ostream &, const Point & );
public:
   Point( int = 0, int = 0 );      // default constructor
   void setPoint( int, int );      // set coordinates
   int getX() const { return x; }  // get x coordinate
   int getY() const { return y; }  // get y coordinate
protected:        // accessible to derived classes
   int x, y;      // coordinates of the point
};

#endif


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