How to create separate class file?

Hi

I'm just starting to learn C++ from various web sources but have come a bit unstuck. I have the below code which works fine but I'd ideally like to separate the CD class code into a separate file and then call it from within my code.

How do I go about this? Do I need to create a header file or separate source code file? And how do I refer to the class from within my main code?




#include <iostream>
#include <string>

using namespace std;

class CD
{
      public:
            CD();    // Default Constructor
            CD(string a, string t, int n, int y):artist(a), title(t), noOfTracks(n), year(y) {} //Constructor with values

            void setArtist(string newArtist)
            {
                  artist = newArtist;
            }
            string getArtist()
            {
                  return artist;
            }
            
            void setTitle(string newTitle)
            {
                  title = newTitle;
            }
            string getTitle()
            {
                  return title;
            }

            void setNoOfTracks(int newNoOfTracks)
            {
                  noOfTracks = newNoOfTracks;
            }
            int getNoOfTracks()
            {
                  return noOfTracks;
            }
            
            void setYear(int newYear)
            {
                  year = newYear;
            }
            int getYear()
            {
                  return year;
            }

      private:
            string artist;
            string title;
            int noOfTracks;
            int year;
};

void main()
{
      //define input holders
      string inputArtist;
      string inputTitle;
      int inputNoOfTracks;
      int inputYear;

      //get input for first class
      cout<<"Favourite album \n \n";

      cout<<"\n Please enter name of artist: ";
      getline(cin, inputArtist);

      cout<<"\n Please enter title of album : ";
      getline(cin, inputTitle);

      cout<<"\n Please enter number of tracks : ";
      cin>>inputNoOfTracks;

      cout<<"\n Please enter year of album : ";
      cin>>inputYear;
      cin.ignore(); //need to find out why we need this one!!!

      //create class with values
      CD myFavouriteCD(inputArtist, inputTitle, inputNoOfTracks, inputYear);

      //get input for second class
      cout<<"\n \n Worst album \n \n";

      cout<<"\n Please enter name of artist: ";
      getline(cin, inputArtist);

      cout<<"\n Please enter title of album : ";
      getline(cin, inputTitle);

      cout<<"\n Please enter number of tracks : ";
      cin>>inputNoOfTracks;

      cout<<"\n Please enter year of album : ";
      cin>>inputYear;

      //create class with values
      CD myWorstCD(inputArtist, inputTitle, inputNoOfTracks, inputYear);

      //print out values of first class
      cout<<"\n \n Favourite album";

      cout<<"\n Artist : "<<myFavouriteCD.getArtist();
      cout<<"\n Title : "<<myFavouriteCD.getTitle();
      cout<<"\n Number of tracks : "<<myFavouriteCD.getNoOfTracks();
      cout<<"\n Year : "<<myFavouriteCD.getYear();

      //print out values of second class
      cout<<"\n \n Worst album";

      cout<<"\n Artist : "<<myWorstCD.getArtist();
      cout<<"\n Title : "<<myWorstCD.getTitle();
      cout<<"\n Number of tracks : "<<myWorstCD.getNoOfTracks();
      cout<<"\n Year : "<<myWorstCD.getYear()<<"\n";
}



Thanks!