On Wed, Jul 06, 2022 at 10:15:51AM +1000, Norman wrote:
> Hi all,
>
> Consider this bit of code:
>
> unsigned int d=1,e=2,f;
>
> if((d-e) < 0)
> {
> f=d-e;
> printf("f=%i",f);
> }
>
> gcc -Wall -DLinux -D_FILE_OFFSET_BITS=64 -c scroll.c
>
> gcc compiles this without a whimper.
>
> However the expression (d-e) < 0 always evaluates to false (0). gcc type
> casts (d-e) as unsigned.You need to include -Wextra to get the warning. Marek
