int main (int argc, char** argv) {
	printf("parent\n");
	int i, pid;

	if ((pid=fork()) == -1) {
		printf("error creating process\n");
		exit(1);
	}

	if (pid == 0) {
		for (i=0; i<10; i++) {
			sleep(1);
			printf("child %d\n",i);
		}
	}
	if (pid > 0) {
		printf("child's pid=%d\n",pid);
		for (i=0; i<10; i++) {
			sleep(1);
			printf("parent again %d\n",i);
		}
	}
	return 0;
}