Thanks.
"James" <[EMAIL PROTECTED]> ??? news:[EMAIL PROTECTED] ???... > > DongDong wrote: > > > > Why could author assume the base address equal to zero? As most C > > programmer know, memory should be allocated by system. The pointer > > shouldn't be assigned an absolute address, even address 0x0000. > > > > Is the address zero under Palm OS free to use? I'm confused. > > Welcome to advice. > > In C, assigning 0 to a pointer type has a special meaning--it assigns that > pointer to the corresponding null pointer. > > The preprocessor macro NULL is #define'd to be 0 (or sometimes to ((void*) 0).) > So really, it doesn't matter whether you assign a pointer to 0 or to NULL; > it's only a style issue. > > Note that this does /not/ mean that the null pointer is all-bits-zero (although > for most platforms it is). This is all explained in more detail in the > comp.lang.c FAQ: > > <http://www.eskimo.com/~scs/C-faq/s5.html> > > > __________________________________ > Do you Yahoo!? > SBC Yahoo! DSL - Now only $29.95 per month! > http://sbc.yahoo.com > > -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
