#include <stdio.h>
struct rr {
	int z,w;
	struct rr * sig;
};
main(){
	FILE *f;
	struct rr x;
	x.z=666;
	f = fopen("curso2005filebs","r+b");
	fread(&x,sizeof(struct rr),1,f);
	fclose(f);
	printf("%d\n",x.z);
}