Не могу разобраться с файлом "stdafx"

#include"stdafx.h"
#include<iostream>
#include<string>
#include<fstream>
using namespace std;
 
int _tmain(int argc, _TCHAR* argv[])
{
    player *player;
    CD *cd1, *cd2;
    DVD *dvd;
    cd1 = new AudioCD();
    //cd1 -> add();
    //cout <<cd1->a <<cd1->t.b <<((AudioCD*)cd1)->e;
    //system ("pause");
    
    cd1 -> LaodFromFile(" D:\oop_lab1.txt ");
    cd2 = new AudioCD (cd1);
    //compare AudioCD by audio tracks count
    cout << Max <AudioCD> (cd1, cd2) << endl;
    cd2 -> remove (1);
    cout << Max <AudioCD> (cd1, cd2) << endl;
    cd2 -> push (new AudioTrack (new AudioFormat("MP3")));
    cout << Max <AudioCD> (cd1, cd2) << endl;
    cd2 -> push (new AudioTrack (new AudioFormat("WAV")));
    cout << Max <AudioCD> (cd1, cd2) << endl;
    
    player = new Player (cd1);
    //show cd info
    player -> read();
    player -> display();
    player -> play();
    while (player -> cd -> songs [player -> getTrackIndex]. getTrackPosition() < 10) player -> display();
    player -> next();
    player -> display();
    player -> setTrackIndex(10);
    player -> play();
    while (player -> cd -> songs [player -> getTrackIndex]. getTrackPosition() < 10) player -> display();
    player -> stop();
    player -> load(cd2);
    player -> play(2);
    player -> setVolume(50);
    
    dvd = new DVD (cd1, cd2);
    player -> load (dvd);
    player -> play();
    return 0;
}