why sscanf does not work for reversed array address 1

[tjroamer]

Hi gurus,
a behavior of sscanf is confusing me:
I wrote a program like this:

char *mac = "00:12:34:5a:6b:8f";
unsigned char da[6];
sscanf(mac, "%2x:%2x:%2x:%2x:%2x:%2x", da+5, da+4, da+3, da+2, da+1, da);

I found only the first byte of da is scaned correctly, but if I wrote the program like this, it just works fine:

sscanf(mac, "%2x:%2x:%2x:%2x:%2x:%2x", da, da+1, da+2, da+3, da+4, da+5);

since the sscanf will put the scaned value to the corresponding address, why did I get this confusing behavior?

Thanks for your tips in advance.
regards
Kenny

 

[ArkM]

The %x format specification describes (pointer to) int (or unsigned int) variable in arg list of (s)scanf() - not to pointer to char arg as in the snippet above. Read these six values into int vars then assign these values to da char array elements.
That's all...

 

[tjroamer]

yes, exactly.
I got it. Thanks a lot for your help.
/Kenny