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Point et ColorPoint in C++ 

#include <stdio.h>



include <fstream.h>



class Point {// interface
    int x;
      public:
    void setx(int y);
    int getx();
};



//implementation
int Point::getx() {return x;};
void Point::setx(int y) {x=y;};



class ColorPoint: public Point {//interface
    char c;
      public:
    void setcol(char d);
    char *getcol();
};



//implementation
void ColorPoint::setcol(char d) {free(c);
                                  c=(char )malloc(strlen(d));
                                  strcpy(c,d);};
char *ColorPoint::getcol() {return c;};



main()
{
  Point      p;
  ColorPoint q;



  p.setx(3);
  q.setx(4);
  q.setcol("blue");
  cout<<"Point at "
      <<p.getx()
      <<" "<<q.getcol()
      <<" Colorpoint at "
      <<q.getx()
      <<"\n";;
}


Roberto DiCosmo
Mon Jun 3 18:29:31 MET DST 1996