What kind of encoding is used by torrent files and how can i append trackers?

I need to modify trackers in torrent files using C, What type of encod开发者_JS百科ing do they use?? When I just print characters in ascii they print gibberish. Or is there a direct way of adding trackers to a torrent file using C?

Have you tried documenting yourself regarding .torrent file format ? The Wikipedia article seems to be pretty complete on this question.