#include "stdafx.h"
#include <vector>
#define fp32 float
#define u32 unsigned int
class BV
{
public:
    BV(fp32 x, fp32 y)
        : _x(x)
        , _y(y)
    {
    }

public:
    fp32 _x;
    fp32 _y;
};
std::pair<u32, BV&> GetValue(std::vector<BV>& values, u32 index)
{
    return std::make_pair(index, values[index]);
}

void TestAll()
{
    std::vector<BV> values;
    values.push_back(BV(0.0, 0.0));
    values.push_back(BV(2.0, 0.0));
    values.push_back(BV(3.0, 0.0));
    std::pair<u32, BV&> pair1 = GetValue(values, 0);
    BV& val1 = GetValue(values, 0).second;
    //BV& val1 = pair1.second;
    fp32 a = val1._x + 1.0f;
    std::pair<u32, BV&> pair2 = GetValue(values, 0);
    BV& val2 = GetValue(values, 2).second;
    //BV& val2 = pair1.second;
    fp32 b = val2._x + 1.0f;
    printf("val1 x = %f; y = %f;\n", val1._x, val1._y);
    printf("val2 x = %f; y = %f;\n", val2._x, val2._y);
    fp32 c = val1._x + 1.0f;
    printf("val1 x = %f; y = %f;\n", val1._x, val1._y);
    printf("val2 x = %f; y = %f;\n", val2._x, val2._y);
}
int _tmain(int argc, _TCHAR* argv[])
{
    TestAll();
    return 0;
}