to show you this I'll use tablature. 1 means the first fret of that string. 2 means the second fret etc. Below are the strings, with the top being the highest.
e- 1 e- 1
B- 1 B- 3
G- 2 G- 3
D- 3 D- 3
A- 3 A- 1
E- 1 E- x
In order to do those chords, you have to bar every string with your pointer finger, then use the rest of your fingers for the rest of the strings. "x" means you don't hit that string. The easiest thing to do is hold it down gently with your finger.
These are basic finger positionings for major chords, with the lowest note the root note. So, 133211 and x13331 are major chords, so are 244322 and x24442. This also works for 022100 and x02220.
Minor chords are similar, except you move one finger. For a major chord, referring back to 133211, it would be 133111, so the 2 is taken off to be one. Referring to x13331, it would be 13321, so the 3 is moved down to 2 (this finger position looks a lot like a major chord.)