#include <iostream>
#include <conio.h>
 
using std::cout;
using std::endl;
 
struct TData
{
	float fWeight;
	float fLength;
};
 
typedef float (TData::*TDataFloatPointer); // pointer to member
 
float CalcAverage(const TData* pArray, int iSize, TDataFloatPointer p)
{
	float fAverage = 0;
	for(int i = 0; i < iSize; ++i)
	{
		float f = pArray->*p; // derefernce through the pointer to member
		fAverage += f;
		++pArray;
	}
 
	return fAverage/iSize;
}
 
void PrintArrayData(const TData* pArray, int iSize, TDataFloatPointer p)
{
	float fAverage = CalcAverage(pArray, iSize, p);
 
	for(int i = 0; i < iSize; ++i)
		cout << pArray++->*p << endl;
 
	cout << "Average:" << endl << fAverage << endl;
}
 
int main()
{
	const TData vData[] =
	{
		{ 1.0f, 10.0f },
		{ 2, 9 },
		{ 3, 8 },
		{ 4, 7 },
		{ 5, 6 },
		{ 6, 5 },
		{ 7, 4 },
		{ 8, 3 },
		{ 9, 2 },
		{ 10, 1 }
	};
	const NUM_DATA = sizeof(vData)/sizeof(vData[0]);
 
	cout << "Weights:" << endl;
	PrintArrayData(vData, NUM_DATA, &TData::fWeight); // get the pointer to member
 
	cout << "Length:" << endl;
	PrintArrayData(vData, NUM_DATA, &TData::fLength);
 
	getch();
}