oop_in_c/main.c

#include <stdio.h>
#include <stdlib.h>

#include "ColoredSquare.h"

int main (int argc, char *argv[])
{
  int i = 0;
  Figure *fig[3];

  fig[0] = Square_new ();
  fig[1] = ColoredSquare_new ();

  ((ColoredSquare *) fig[1])->vtable->set_color (fig[1], 5);
  ((Square *) fig[0])->vtable->resize (fig[0], 2);
  ((Square *) fig[1])->vtable->resize (fig[0], 3);

  fig[2] = fig[1]->vtable->clone (fig[1]);
  ((ColoredSquare *) fig[2])->vtable->set_color (fig[2], 3);

  for (i = 0; i < sizeof (fig) / sizeof (Figure *); i++)
    {
      printf ("--- type = %s ---\n", fig[i]->vtable->type (fig[i]));

      fig[i]->vtable->draw (fig[i]);

      printf ("area(%lu) = %f\n",
              (unsigned long) fig[i],
              fig[i]->vtable->area (fig[i]));

      printf ("diag_length(%lu) = %f\n",
              (unsigned long) fig[i],
              ((Square *) fig[i])->vtable->diag_length (fig[i]));

      puts ("---\n");
    }

/*goto end;
err:
end:*/
  fig[0]->vtable->destroy (fig[0]);
  fig[1]->vtable->destroy (fig[1]);

  return 0;
}