NuB Question about classes

[g_loughnan]

Hi there,

I'm trying to write a program to accept some details about mp3 files, and store them in an array. I am also hoping to process some of the parameters of each entry to the array.
I am trying to create an object of type "Track", and then define a method "createTrack" to define some parameters to describe the Object "Track". This is what I've come up with, but needless to say, it doesn't work! :( If anyone could suggest some adjustments, it would be much appreciated!

#include<iostream>
#include<string>
 
using namespace std;
using std::string;
 
class Track{


public:

	Track(void);
		
	void time();
	void createTrack();

};

void Track::createTrack()
{
	string title;
	string artist;
	float duration;

	cout <<"Please enter track title: ";
	cin >> title;

	cout <<"Please enter track artist: ";
	cin >> artist;

	cout <<"Please enter track duration in seconds: ";
	cin >> duration;
}

void Track:time(int duration)
{

	mins = (duration/60);

	secs = (duration%60);

	cout << "The track time is: " << mins << "minutes and" << secs << "seconds" << endl;
}


int main()
{

	for (int i=0; i<5; i++) 
	{
		Track a; //Create a new object of type "Track"
		TrackArray[i] = a.createTrack;	//Call the "createTrack" method on the object 
	}									//"a" and store it in the array "TrackArray[4]"

	TrackArray[1].time;	//Call the "time" method on the 1th entry of the array

	system("Pause");
	return EXIT_SUCCESS;
}

[Duoas]

You can get rid of the line Track(void); Move the following three lines: string title; string artist; float duration; to between the two lines: class Track { and public: Since duration is in seconds, it should probably be int, not float.

Make your time function match its prototype: void Track::time() In main(), declare your track array variable: Track TrackArray[ 5 ]; Get rid of: Track a; and make the next line read: TrackArray[i].createTrack(); Finally, when you call the time() method: TrackArray[1].time(); Your problems are mostly syntactical, but you should also read some more on creating and using classes. Try to find examples (there're tons on the internet).

Hope this helps.

[g_loughnan]

Hi Duoas,

Thanks for your help. I made the changes like you said and it compiled with no errors and just one warning about missing arguement list for:

TrackArray[i].createTrack;

I also had to comment out:

TrackArray[1].time();

as no "Track" objects had been created.

While the program runs, the "createTrack" method isn't implemented:?: . Can you or anyone see why?
Thanks again for your help Duoas,
Ger.

[g_loughnan]

I got it, I wasn't including a constructor for Track.

[g_loughnan]

Apologies for Another post, I didn't mark the last one as a solution. Happy C++'ing! ;)