[Courses] [C] Lesson12: Exercise answers

[Eugene Teo]

More comments inline:

>     stringpointer = stringlook(string);
>     if (stringpointer == NULL) {
>         printf("Did not find any non-whitespace characters.\n");
>     } else {
>         printf("Pointer reads: %c\n", *stringpointer);
>     }

Personal preference. I find it more elegant to do:

if( !(stringpointer = stringlook(string)))
   printf("lala");
else
   printf("lalala");

> This sort of bug is very common.  If you've ever seen "Segmentation
> Fault" on unix or "General Protection Fault" on windows, it's probably
> because something dereferenced an invalid pointer.

I have not seen GPF for a long time. Whoops, I forgot I haven't use
Windows for a long time :)

> > char *stringlook(char *string) {
> >    unsigned short i;
> > 
> >    for(i=0; *(string+i) != '\0'; i++) {
> >       if( *(string+i) != ' ') return (string+i);
> >    }
> > 
> >    return 1;
> 
> I would do:
>      return NULL;
> here instead.

And include stdlib.h

> > }
> 
> -- 
> laurel at sdf.lonestar.org
> http://dreadnought.gorgorg.org
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