void InPut(Lop s[], int &n)
{
	do {
		printf("Nhap so luon can them: ");
		scanf_s("%d", &n);
	} while (n < 1);
	for (int i = 0; i < n; i++)
	{
		printf("1. Nhap ma lop");
		scanf_s("%d", &s[i].MaLop);
		rewind(stdin);
		printf("2. Nhap ten hoc phan");
		gets_s(s[i].TenHocPhan);
		printf("3. Nhap phong hoc");
		gets_s(s[i].PhongHoc);
		do {
			printf("4. Nhap ngay hoc trong tuan");
			scanf_s("%d", &s[i].NgayHoc);
		} while (s[i].NgayHoc < 2 && s[i].NgayHoc > 7);
		rewind(stdin);
		do {
			printf("5. Nhap tiet hoc:");
			gets_s(s[i].TietHoc);
		} while (s[i].TietHoc[1] != '-');
	}
}

void SapXep(Lop s[], int n)
{
	for (int i = 0; i < n-1; i++)
	{
		for (int j = i + 1; j < n; j++)
		{
			if (s[i].MaLop > s[j].MaLop)
			{
				Lop temp = s[i];
				s[i] = s[j];
				s[j] = temp;
			}
		}
	}
}
void TimKiemTheoPhong(Lop s[], int n)
{
	int flag = 0;
	char search[11];
	printf("Nhap ten phong:");
	gets_s(search);
	printf("Ma lop\tTen hoc phan\tPhong hoc\tNgay hoc\tTietHoc\n");
	for (int i = 0; i < n; i++)
	{
		if (strcmp(search, s[i].PhongHoc) == 0)
			XuatLop(s[i]);
	}
}
void XuatLop(Lop s)
{

	printf("%d\t%s\t%s\t%d\t%s\n", s.MaLop, s.TenHocPhan, s.PhongHoc, s.NgayHoc, s.TietHoc);
}
void XuatTatCa(Lop s[], int n)
{
	printf("Ma lop\tTen hoc phan\tPhong hoc\tNgay hoc\tTietHoc\n");
	for (int i = 0; i < n; i++)
	{
		XuatLop(s[i]);
	}
}
void KiemTraTrungPhong(Lop s[], int n)
{
	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < n; j++)
		{
			if ((strcmp(s[i].PhongHoc, s[j].PhongHoc) == 0) && (atoi(s[i].TietHoc) == atoi(s[j].TietHoc)) && (s[i].NgayHoc = s[j].NgayHoc))
				printf("%d", s[i].MaLop); break;
		}
	}
}