/*
	if (num == 1)
	{
		goods_idx = GetGoodsNum(p->goods.name);
		variety_idx = GetVarietyNum(goods_idx, p->variety.name);
		supplier_idx = GetSupplierNum(p->supplier.name);
		if (del_num < p->num)
		{
			p->num = p->num - del_num;
		}
		else
		{
			head = p->next;
			free(p);
		}
	}
	else if (num == i)
	{
		for (int j = 1; j < num - 1; j++)
		{
			q = q->next;
		}
		p = q->next;
		int goods_idx = 0, variety_idx = 0, supplier_idx = 0;
		if (p != NULL)
		{
			goods_idx = GetGoodsNum(p->goods.name);
			variety_idx = GetVarietyNum(goods_idx, p->variety.name);
			supplier_idx = GetSupplierNum(p->supplier.name);
		}

		if (p != NULL && p->num < del_num)
			p->num = p->num - del_num;
		else
		{
			q->next = NULL;
			free(p);
		}
	}
	else if (num > 1 && num < i)
	{
		for (int j = 1; j < num - 1; j++)
		{
			q = q->next;
		}
		p = q->next;
		goods_idx = GetGoodsNum(p->goods.name);
		variety_idx = GetVarietyNum(goods_idx, p->variety.name);
		supplier_idx = GetSupplierNum(p->supplier.name);
		if (p->num < del_num)
			p->num = p->num - del_num;
		else
		{
			q->next = p->next;
			p = p->next;
		}
	}
	*/