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7.7

How to randomly select one object from all objects with a specific set of attributes...

Asked by ltdanp22 in Programming Languages, C++ Programming Language

Tags: C++

The code below creates tens of thousands of PeerGroup objects. Each PeerGroup object has a number of attributes including AgeGroupID and a CountyID. I need to write a function that chooses one PeerGroup object at random from among all the PeerGroup objects that have CountyID = X and AgeGroupID = Y.

Note that individuals are created in a separate function before PeerGroups. When they are created, they are assigned PeerGroupIDs even though the PeerGroup objects have yet to be created.

When the code below creates an array of PeerGroup objects, are the objects created automatically or does the array need to be explicitly filled in with PeerGroup objects?

Based on the code below, how do I create and set the CountyID and AgeGroupID attributes?

How do I randomly choose one PeerGroup object from among all the PeerGroup objects that have CountyID = X and AgeGroupID = Y?

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             class CPeerGroup: public CSocialGroup
{
private:
 
	int m_iPeerGroupID, m_iCTOrCountyID, m_iAgeGroup;
public:
	CPeerGroup()
	{
		SetGroupType(PEERGROUP);
	}
 
	CPeerGroup(const int iGroupID)
	{
		SetGroupID(iGroupID);
		SetGroupType(PEERGROUP);
	}
	~CPeerGroup(){}
 
	int GetPeerGroupSize();
	double GetInfHazardGroup();
	double GetFOIDenominator(){ return 1.0;}
 
	CPeerGroup& operator=(CPeerGroup& y)
	{
		m_iPeerGroupID = y.m_iPeerGroupID;
		m_iAgeGroup = y.m_iAgeGroup;
 
		return *this;
	}
 
	int GetPeerGroupID(){ return m_iPeerGroupID;}
	int GetCountyID(){ return m_iCTOrCountyID;}
	int GetAgeGroup(){ return m_iAgeGroup;}
	void SetAgeGroup(const int iAgeGroup){ m_iAgeGroup = iAgeGroup;}
	void SetPeerGroupID(const int iGroupID){ m_iPeerGroupID = iGroupID;}
	void SetCTOrCountyID(const int iGroupID){ m_iCTOrCountyID = iGroupID;}
 
	vector<CPeerGroup> g_pPeerGroupList;
};
 
if (g_iMaxNumGroups[PEERGROUP] < iPeerGroupCounter)
{
	if (g_cPeerGroup != NULL)
		delete [] g_cPeerGroup;
		g_iMaxNumGroups[PEERGROUP] = static_cast<int>(1.05*iPeerGroupCounter);
		g_cPeerGroup = new CPeerGroup[g_iMaxNumGroups[PEERGROUP]];
		g_vPeerGroup.push_back(g_cPeerGroup)
}
 
for (iCounter = 0; iCounter < gc_iPopulationSizeTotal; ++iCounter)
	g_cPeerGroup[g_cIndividual[iCounter].GetPeerGroupID()].AddToMemberList(iCounter);

           
         

How to randomly select one object from all objects with a specific set of attributes...

Asked by ltdanp22 in Programming Languages, C++ Programming Language

Tags: C++

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