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| subject: | Value returned fom a function |
-=> On 22 Apr 96 16:36:48 <=-
-=> Joshua Marshall was heard to tell John Gardeniers <=-
Hello Joshua,
JG> I use PCC and to keep the speed up, as much as practical (I use
JG> an XT to do my programming), I avoid header files.
JM> You are truly a sick man.
It's cheaper than whips and chains.
JM> The general idea of using zero for FALSE and non-zero for TRUE is that
JM> you can do things like this:
JM> is_working=TRUE;
You can still do that if TRUE=0.
JM> Also if a function returns either TRUE or FALSE you can have it in a
JM> conditional the same way, eg:
JM> if (ok_to_save())
JM> {
JM> save_it();
JM> }
I would use:
if(!ok_to save())
save_it();
I will admit that my normal use of "if (!function())" to test for
success does read a bit reversed but then again have a look at what we *do*
get used to doing!
JM> When you know that the variable or function is boolean it makes the
JM> code easier to read and understand.
JM> For instance, my first example with your definitions:
JM> is_working=TRUE;
JM> if (is_working==TRUE)
JM> {
JM> blah;
JM> }
JM> Isn't quite as easy to read for debugging purposes.
What about this:
if(function())
{
switch(is_working())
{
case 1:
{
do error stuff 1;
break;
}
case 2:
{
do error stuff 2;
break;
}
case n:
{
do error stuff n;
break;
}
default:
{
do unrecognised error stuff;
break;
}
}
}
fell through so must have succeeded;
JM> Member TEAM AMIGA AmigaNet 41:400/452.35
^^^^^
And you said *I* was a sick man!!! :-)
John
... Anything that works can't be ALL bad.
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