Basically you need a program to do the conversion, easy to do on a pc if your MP3 player has USB and you have a cd burner drive.
The PC will recognise the MP3 and it's contents as an additional drive.
In fact most PC's will have an installed programme that will do it, failing that Google MP3 to CD to find some free software.
my cd player does have mp3 written on it so how to i burn a cd with mp3 files
if i plug the mp3 in to the computer what programdo i then need
We don't know how competent with a PC or how modern your PC is.
Most PC's built in the last few years will have the software already installed.
Plug your MP3 into the PC, you should get an invite to do several things, click on the open folder or view files, you are now seeing all the songs on your MP3.
A right click of your mouse should give you other options now, one of those will be copy to disc, that will burn you a MP3 disc, another option should be .. make audio disc, that will convert the files to normal CD.
it's one of those things that is so easy to do but if never done before can be a little baffling.
If you have windows media installed already, this video will help
http://www.videojug.com/film/how-to-burn-an-audio-cd-using-windows-media-player