1 mike  1.1 
 2           

 3 mike  1.2     1.	Indent four spaces (not three and not tabs).

 4 mike  1.1 
 5               2.	Literals used (other than 0 or 1).
 6           
 7               3.	NULL used in several places.

 8 mike  1.2 
 9               4.  Put braces on their own lines like this:
10           
11           	    if (condition)
12           	    {
13           
14           	    }
15           
16           	Avoid this style:
17           
18           	    if (condition) {
19           
20           	    }