negate INT_MIN

[jzhang918]

Hi,

Should f(INT_MIN) return 0 according to the C99 for the following
function f (), or its result is undefined?

int f(int i)
{
i = i > 0 ? i : -i;
if (i<0)
return 0;
else
return 1;
}

Thanks!
Jie

 

[Guest]

Hi,

Should f(INT_MIN) return 0 according to the C99 for the following
function f (), or its result is undefined?

int f(int i)
{
i = i > 0 ? i : -i;
if (i<0)
return 0;
else
return 1;
}

It should return 1 when INT_MIN is equal to -INT_MAX. The behaviour
(not just the result) is undefined when INT_MIN is equal to -INT_MAX -
1.

 

[¬a\\/b]

Hi,

Should f(INT_MIN) return 0 according to the C99 for the following
function f (), or its result is undefined?

int f(int i)
{
i = i > 0 ? i : -i;
if (i<0)
return 0;
else
return 1;
}

it seems undefined
if i see a char -128..127
-(-128)==?