Sorry, but there were some spelling mistakes and such in my old 
c major chord tab, so this is the new one without and mistakes. 
 Just vote it in please.
Just in case you are not familiar with tablatures, these six 
lines represent the following strings on the guitar
|=high e
|=B
|=G
|=D
|=A
|=low E

Here is how to play a "C Major" chord.  There are 4 ways to play it.
A "C" Chord is always composed of 3 different notes as long as 
its major.  C, E, and G.

1: The basic C Chord
|-0-|-->This is an E note.
|-1-|-->This is a C note.
|-0-|-->This is the G note.
|-2-|-->Here is another E note.
|-3-|-->This is another C note in the bass.
|-x-|-->Dont play this string

2: Add a high "G" note.  You can do this with many chords to add jazz 
to them.
|-3-|-->The E note that was here before becomes a high G note.  
|-1-|-->This is the same C note.
|-0-|-->And the same G.
|-2-|-->The same E.
|-3-|-->The same C in the bass.
|-x-|-->Dont play this string.

3: The E-string "C Major" Power Chord.  This is one of the many 
power chords commonly used in rock music.  All E-string major 
power chords use this same fingering, so it is important to remember 
this fingering.  It is also easy to play any power chord because 
you will get used to holding your fingers like this.
|-8--|-->This is a high C note.
|-8--|-->This is a G note.
|-9--|-->This is an E note.
|-10-|-->This is a C note.
|-10-|-->This is a G note.
|-8--|-->Here is the C found in the bass of the regular C chord.

4: The A-string "C Major" Power Chord.  Any A-string major power 
chord has this fingering as well.  That is why power chords are 
so easy to play.
|-3-|-->This is the high G note.
|-5-|-->This is an E note
|-5-|-->Here is a C note.
|-5-|-->Here is a G note.
|-3-|-->And a C in the bass.
|-x-|-->Dont play this string.

These are the fundamental "C Major" chords in the guitar world. 
 You actually can take any combination of the notes C, E, and G 
and make a "C Major" chord out of them.  But to tell you the truth, 
you will never find yourself using any other combination than 
the ones shown here.  So good luck, and practice the fingering 
of these chords.  After that they come naturally to you.