Block Structure

In order to make the source code readable always use braces around blocks, and put braces on the next line, even if it is unambiguous. Use

if (foo) 
{
    blah();
}
else 
{
    bleh();
}

for (i=0; (i<imax); i++)
{
    printf("Foo %d\n",i);
}

rather than:

if (foo)
  blah();
else
  bleh();
for(i=0;i<imax;i++) 
  printf("Foo %d\n",i)

Note that there is an empty line between the two logical blocks (if statement and for loop)

Try to add a comment before a loop or conditional statement to tell *why* you are doing something, not what you are doing. Most users hacking the code know that i++ means that you incrementing i, but why are you incrementing it?

Spaces are good - that's what the space-bar on your keyboard is so large :-) Personally I feel that e.g. using parentheses around the i<imax test in the loop above is unnecessary, but to make a point I won't alter it: if in doubt, use spaces or parentheses! --Lindahl 21:14, 27 February 2009 (CET)