Question about probability in c++

[Syriza 229]

Hey community can anyone help me with one Question?

 

i want to Change the probability of receiving a additional apply

 

		for (int i = 0; i < additional_attr_num; i++)
		{
			int r = random_set[i];
			const SApply& additional_attr = vec_addtional_applys[r];
			BYTE bType = additional_attr.apply_type;
			short sValue = (short)(ceil((float)additional_attr.apply_value * fWeight - 0.01f));

			pDS->SetForceAttribute(DRAGON_SOUL_ADDITIONAL_ATTR_START_IDX + i, bType, sValue);
		}

 

how do i Change this like it rarely gives the max Attribute?

 

 

here is the full function

bool DSManager::PutAttributes2(LPITEM pDS)
{
	if (!pDS->IsDragonSoul())
	{
		sys_err ("This item(ID : %d) is not DragonSoul.", pDS->GetID());
		return false;
	}

	BYTE ds_type, grade_idx, step_idx, strength_idx;
	GetDragonSoulInfo(pDS->GetVnum(), ds_type, grade_idx, step_idx, strength_idx);

	DragonSoulTable::TVecApplys vec_basic_applys;
	DragonSoulTable::TVecApplys vec_addtional_applys;

	if (!m_pTable->GetBasicApplys(ds_type, vec_basic_applys))
	{
		sys_err ("There is no BasicApply about %d type dragon soul.", ds_type);
		return false;
	}
	if (!m_pTable->GetAdditionalApplys(ds_type, vec_addtional_applys))
	{
		sys_err ("There is no AdditionalApply about %d type dragon soul.", ds_type);
		return false;
	}

	
	int basic_apply_num, add_min, add_max;
	if (!m_pTable->GetApplyNumSettings(ds_type, grade_idx, basic_apply_num, add_min, add_max))
	{
		sys_err ("In ApplyNumSettings, INVALID VALUES Group type(%d), GRADE idx(%d)", ds_type, grade_idx);
		return false;
	}

	float fWeight = 0.f;
	if (!m_pTable->GetWeight(ds_type, grade_idx, step_idx, strength_idx, fWeight))
	{
		return false;
	}
	fWeight /= 100.f;

	int n = MIN(basic_apply_num, vec_basic_applys.size());
	for (int i = 0; i < n; i++)
	{	
		const SApply& basic_apply = vec_basic_applys[i];
		BYTE bType = basic_apply.apply_type;
		short sValue = (short)(ceil((float)basic_apply.apply_value * fWeight - 0.01f));

		pDS->SetForceAttribute(i, bType, sValue);
	}

	BYTE additional_attr_num = MIN(number (add_min, add_max), 3);

	std::vector <int> random_set;
	if (additional_attr_num > 0)
	{
		random_set.resize(additional_attr_num);
		std::list <float> list_probs;
		for (int i = 0; i < vec_addtional_applys.size(); i++)
		{
			list_probs.push_back(vec_addtional_applys[i].prob);
		}
		if (!MakeDistinctRandomNumberSet(list_probs, random_set))
		{
			sys_err ("MakeDistinctRandomNumberSet error.");
			return false;
		}

		for (int i = 0; i < additional_attr_num; i++)
		{
			int r = random_set[i];
			const SApply& additional_attr = vec_addtional_applys[r];
			BYTE bType = additional_attr.apply_type;
			short sValue = (short)(ceil((float)additional_attr.apply_value * fWeight - 0.01f));

			pDS->SetForceAttribute(DRAGON_SOUL_ADDITIONAL_ATTR_START_IDX + i, bType, sValue);
		}
	}