As I remember if(1) evaluates to true and all other numbers including 0
evaluate to false.
But where do I find out about this for sure?? I have looked through K&R, all
the C for dummies books and various other C programming books but nowhere
there is a mention on what a number in an if statement evaluates to.
Is this some kind of big secret?
Nov 15 '05
22  30029 
August Karlstrom wrote: The real virtue of the bool type is that it conveys more information
compared to an int used as a boolean type. You never need comments as
"non-zero if... and zero if...". You still need to know though that it
is really just an int and that zero is interpreted as `false' and
non-zero as `true'.
Yes, easier documentation is an advantage and I use it with C90
compilers by declaring a typedef for bool or boolean. Then you can
document as you say. Another good strategy is to choose a boolean
variable name that implies the true state:
bool valveOpen; /* valve is currently open */
as opposed to
bool valveState; /* valve position: 1=open, 0=closed */
Thad
August Karlstrom wrote: I assume the p suffix stands for "predicate" , right? This is a kind of
Hungarian notation that is common practice in languages that lacks a
boolean type, e.g. Emacs lisp. With a boolean type there's no need for
obscure naming, we just go:
Since your answer is completely nonresponsive, I suppose that means you
actually have nothing to say.
Martin Ambuhl wrote: August Karlstrom wrote:
I assume the p suffix stands for "predicate" , right? This is a kind of
Hungarian notation that is common practice in languages that lacks a
boolean type, e.g. Emacs lisp. With a boolean type there's no need for
obscure naming, we just go:
Since your answer is completely nonresponsive, I suppose that means you
actually have nothing to say.
A mutual conclusion, I think ;-) This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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