gcc compiler warnings

[Andrew Haley]

On 05/19/2010 10:42 AM, lee wrote:
> Hi simple qeuery ...
> 
> why does gcc give a warning:   warning: value computed is not used
> 
> for...  ptr++;
> 
> when the value is actually used!
> 
> code segment...
> do {
>        oldval=*ptr;//make local copy
>              *ptr++; // scroll 1 ahead in ring buffer

Do you mean

   ptr++;

?

Andrew.


>        if(isHeader(&oldval) && cntnumber > 1 ) //skip first header word.
> check for header words inside data
>            break;
>        cntnumber += 1;
>    }while(  !isTrailer( &oldval ) && cntnumber < totalchannels  ); //
> copy until the trailer
> 
> Regards
> L
>