STL: Combining the use of map, string and vector

Credits: BS, OGC

This is a basic program to demostrate the posibility of saving some strings and be retrieved their identifiers (ID).

A pair of definitions that can be used to simplify

Code:

#define INDEXFIND_BY_ID * (((PrivateData*)my_data)->findByID)
#define INDEXFIND_BY_NAME (((PrivateData*)my_data)->findByName)

Code:

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
//
// UTN FRGP TSP
// BS
// mail: david_bs@live.com
// web: Etalking.Com.Ar
// 2012
//
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////

#include <windows.h>
#include <stdio.h>

#include <fstream.h>
#include <map>
#include <string>
#include <vector>

using namespace std;

typedef map<int,int> MapIntInt;

struct PrivateData{
	MapIntInt findByID;
	string findByName;
};

void* my_data;

#define INDEXFIND_BY_ID * (((PrivateData*)my_data)->findByID)
#define INDEXFIND_BY_NAME (((PrivateData*)my_data)->findByName)

struct Info
{
	char	szName[36];
	int		iId;
};

vector<Info> infoList;

void Constructor()
{
	my_data = new PrivateData;
}

void Destructor()
{
 * *delete (PrivateData*)my_data;
}

Code:

void Completa(int id, const char* name){

	Info newElemento;

	strcpy( newElemento.szName, name );
	newElemento.iId = id;
	MapIntInt::iterator foundpos = (((PrivateData*)my_data)->findByID).find( newElemento.iId );
	
	typedef MapIntInt::value_type Entry;

	if(foundpos==((((PrivateData*)my_data)->findByID).end()))
	{
		int index = infoList.size();
		infoList.push_back(newElemento);
		(((PrivateData*)my_data)->findByID).insert(Entry(newElemento.iId,index));
		(((PrivateData*)my_data)->findByName).assign(newElemento.szName);
	} 
	else
	{
		int index = foundpos->second;
		infoList[index]=newElemento;
	}
}

Getting access to the names saved in the vector

Code:

const char* getNamebyId(int id)
{
	MapIntInt::iterator foundpos = (((PrivateData*)my_data)->findByID).find( id );
	if(foundpos==((((PrivateData*)my_data)->findByID).end())) { return "none"; }
	int index = foundpos->second;
	return infoList[index].szName;
}

Code:

int main(){

	Constructor();
	Completa(0, "AK");
	Completa(0, "SCOUT");
	Completa(1, "AP");
	Completa(2, "DESERT");

	Completa(1, "M4");
	Completa(1, "M4");
	Completa(1, "M4");

	cout << "La id 0 contiene: " << getNamebyId(0) << endl;
	cout << "La id 1 contiene: " << getNamebyId(1) << endl;
	cout << "La id 2 contiene: " << getNamebyId(2) << endl;


	cin.get();
	Destructor();
	return 0;
}