strange output from printf

[AAAKsu]

Hi!
Can anyone explain why the output of the code
below is 6 7 7 ?

#include <stdio.h>

int main ()
{
int a=5;
printf ("%d%d%d",a++,a,++a);
return 0;
}

[AAAKsu]

Hi!
Can anyone explain why the output of the code
below is 6 7 7 ?

#include <stdio.h>

int main ()
{
int a=5;
printf ("%d%d%d",a++,a,++a);
return 0;
}

I was expecting 5 6 7...

[Dave Sinkula]

http://c-faq.com/expr/evalorder2.html
http://c-faq.com/expr/seqpoints.html

[Salem]

Or even http://www.daniweb.com/forums/thread210533.html