void save_file(Student a[], FILE* filetxt2, int i, int* n) {
	int v = sizeof(a) / sizeof(a[0]);
	for (int i = 0; i < v; i++) {
		fprintf_s(filetxt2, a[i].fio.surname); fprintf_s(filetxt2, "                 ");
		fprintf_s(filetxt2, "%d", a[i].exams); fprintf_s(filetxt2, "  ");
		for (int j = 0; j < 7; j++) {
			fprintf_s(filetxt2, a[i].disp[j]);
			fprintf_s(filetxt2, " ");
		}
		fprintf_s(filetxt2, "\n");
		fprintf_s(filetxt2, a[i].fio.name);  fprintf_s(filetxt2, " ");
		fprintf_s(filetxt2, a[i].fio.patronymic);  fprintf_s(filetxt2, "    ");
		fprintf_s(filetxt2, "%d", a[i].group);  fprintf_s(filetxt2, " ");
		for (int j = 0; j < 7; j++) {
			fscanf_s(filetxt2, "%d", a[i].mark[j]);
			fprintf_s(filetxt2, "   ");
		}
		fprintf_s(filetxt2, "\n");
	}
}