Honggang Xu wrote:
> Or my understand of keyword "volatile" is wrong, following code outputs
> compiled by gcc 4.1.1: x=22 ,y=59
>
> main()
> {
> volatile int x=20,y=35;
> x=y++ + x++;
> y= ++y + ++x;
> printf("x=%d y=%d\n" ,x,y);
>
> }
No, it's not a gcc bug: your program exhibits undefined behaviour.
http://c-faq.com/expr/ieqiplusplus.html
Andrew.
