Any way to view sourcecode of an actual mp3, zip, mpg or jpg file?

Question

Hoping someone could help a complete newbie as ive tried googling this and yahooing and came up with nothing (normaly id read faq's before doing this before posting lol).
Is thier any way to look at the sourcecode or c+ programming of an individual mpg,mp3,zip file, or jpg?
Would a decoder do this, like mpg decoder,jpg decoder etc?
Im using bloodshed dev c+ + compiler to learn on and out of curiosity im wondering if its possible or to look at the sourcode text in binary? Ive noticed files of that type are not supported.
Anotherwords if i had metallica's One on mp3 would it be possible to look at the actual sourcecode/c programming for it, not just an mp3 or mpg standalone source (as many authoring codes are found online).
Anyones help is appreciated-N