fp = fopen("studenci.txt", "r");
	STUDENTL *h, *t;
	STUDENTL *b, *P;
	for (i = 0; i < n; i++) {
		b = (STUDENTL*)malloc(sizeof(STUDENTL));
		if (i == 0) {
			b->p = (STUDENTL*)0;
			h = b;
		}
		else b->p = P;
		if (i > 0) P->n = b;
		if (i == 4) {
			b->n = (STUDENTL*)0;
			t = b;
		}
		fgets(b->imie, 20, fp);
		fgets(b->nazwisko, 30, fp);
		fgets(buffer, 40, fp);
		b->rok = atoi(buffer);
		fgets(b->adres, 40, fp);
		fgets(b->kod, 10, fp);
		fgets(buffer, 40, fp);
		b->stypendium = atof(buffer);
		P = b;
	}
	fclose(fp);