c programming style

[Chris Torek]

> Say we have some item like:
>	main(argc, argv)
>	int argc;
>	char **argv;
> stepping through the array of pointers can be done by by incrementing
> a pointer:
>		argv++;
> This will get us to the next pointer....
>		argv = argv + 1;
> will NOT (unless by the happy happinstance that a pointer is exactly
> the same size as a character!)

Nope.  In this case ``argv = argv + 1'' will get you to the next
pointer, just like ``argv++''.  See any C book, ``pointer arithmetic''.

The form ``lvalue += 1'' is always equivalent to ``++lvalue''
(though many compilers will generate different code for the two).
Furthermore, ``lvalue++'' is equivalent to ``++lvalue'' iff the
value of the expression is not used.  (Again, some compilers---not
many---may generate different code.)
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 4251)
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