Re: [leafnode-list] Compiler warnings (again)

[tmcd@xxxxxxxx (Timothy A. McDaniel)]

>         *(g++);         /* let g point to next element of array */
> Unfortunately, gcc barfs on the *(g++); line with "warning: value
> computed is not used".

What you're telling it to do is, in effect,
    g_orig = g;
    g = g + 1;
    *g_orig;

"*" means "dereference pointer" to get a value or something to assign
to.  You can use pointers like
    int i;
    int *pi;
    ... // set i, pi, *pi
    i = *pi;   // dereference pi's value and assign it to i
    *pi = i;   // assign i's value to what pi points to

But
    *g_orig;
is as sensible as
    i;
or
    25;
You're telling it to take the value and ... do nothing with it.
gcc is right.

If you just want to increment g without looking at or changing what it
points to, which is what the comment seems to indicate,
    g++;
or
    ++g;
or
    g = g + 1;
are all equivalent.  I prefer method 2 because it's obvious from the
start of the line that I'm changing the value.

-- 
Tim McDaniel is tmcd@xxxxxxxx; if that fail,
    tmcd@xxxxxxxxxx is my work account.

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