PyObject の基礎: ソースコード2

cast.c

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

struct base {
	int basic_field;
};

struct extended {
	struct base base;
	int extended_field;
};


int main(void)
{
	struct base *base_obj;
	struct extended *obj = malloc(sizeof(struct extended));

	obj->base.basic_field = 1;
	obj->extended_field = 2;

	base_obj = (struct base *) obj;

	printf("base_obj->basic_field: %d\n", base_obj->basic_field);

	return 0;
}