Signed/unsigned comparisons

Question

I\'m trying to understand why the following code doesn\'t issue a warning at the indicated place.

//from limits.h
#define UINT_MAX 0xffffffff /* maximum unsi         


        

Answer 1

The == operator just does a bitwise comparison (by simple division to see if it is 0).

The smaller/bigger than comparisons rely much more on the sign of the number.

4 bit Example:

1111 = 15 ? or -1 ?

so if you have 1111 < 0001 ... it's ambiguous...

but if you have 1111 == 1111 ... It's the same thing although you didn't mean it to be.