circle.c

Object-Oriented Programming With ANSI-C这本书中的源代码!找了很久

#include <stdio.h>

#include "Circle.h"
#include "Circle.r"
#include "new.h"
#include "new.r"

static void * Circle_ctor (void * _self, va_list * app)
{	struct Circle * self =
		((const struct Class *) Point) -> ctor(_self, app);

	self -> rad = va_arg(* app, int);
	return self;
}

static void Circle_draw (const void * _self)
{	const struct Circle * self = _self;

	printf("circle at %d,%d rad %d\n",
		x(self), y(self), self -> rad);
}

static const struct Class _Circle = {
	sizeof(struct Circle), Circle_ctor, 0, Circle_draw
};

const void * Circle = & _Circle;