C++ linked list with pointers

cpp-linked-list.cpp

#include <iostream>

struct CD {
       int trackNumber;
       CD * nextSong;
       CD(int selection, CD * track) {
              trackNumber = selection;
              nextSong = track;
       }
};

typedef CD * playList;

playList reverseTrack(playList);

int main(void) {

       playList MixTape = new CD(1, nullptr);

       playList selection = MixTape;

       for (int i = 2; i < 4; i++) {
              selection = (selection->nextSong = new CD(i, MixTape));
       
       }
       selection = selection->nextSong;

       for (int i = 0; i < 3; i++) {
              std::cout << selection->trackNumber << "|";
              selection = selection->nextSong;
       }
       std::cout << std::endl;
       selection = selection->nextSong;
       reverseTrack(selection);
       for (int i = 0; i < 3; i++) {
              std::cout << selection->trackNumber << "|";
              selection = selection->nextSong;
       }
       std::cout << std::endl;
       
}

playList reverseTrack(playList selection) {
       playList tempStorage;
       playList tailPointer = selection;
       playList reverseLink = NULL;

       while (tailPointer != NULL) {

              tempStorage = tailPointer->nextSong;
              tailPointer->nextSong = reverseLink;
              reverseLink = tailPointer;
              tailPointer = tempStorage;
       }


       return reverseLink;
}