work with hexadecimal values

[_neo_]

I have two codes in C and in Python.
They gave me different results.
Can anybody explain how they works, why I get different results?
Thank you in advance!!!

In C:
-----------
#include <stdio.h>
int main()
{
int a = 100;
printf("%d = %02x\n", a, a);
a = ~a;
printf("%d = %02x\n", a, a);
return 0;
}

OUTPUT:
100 = 64
-101 = ffffff9b

In Python:
-----------
a = 100
print("%d = %02x"%(a,a))
a = ~a
print("%d = %02x"%(a,a))

OUTPUT:
100 = 64
-101 = -65

[_neo_]

I've found answer, I think.
Link is here: http://bytes.com/topic/python/answers/21351-bitwise-not-not-what-i-expected