On Tue, Jul 07, 2015 at 08:05:50AM +0000, Gaohaifeng (A) wrote:
> int main()
> {
> unsigned char a,b;
> a=251;
> b=254;
> b +=5; // b will overflow
> printf("a=%u \n",a);
> printf("b=%u \n",b);
> printf("(a-b<0)=%d\n",(a-b)<0);
If you look at entity_before() you'll notice that the correct statement
would be:
printf("(a-b<0)=%d\n",(signed char)(a-b)<0);
> printf("(a-b<0)=%d\n",((unsigned char)(a-250)-(unsigned
> char)(b-250)<0));
> return 0;
> }
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