Both long long, and long long numeric literals, are extensions.
A long long numeric literal requires the LL suffix. The compiler doesn't automagically promote "too big" numeric literals into long longs.
My recommendation is to rely upon the 5 year old C99 header file <stdint.h> (even in C++), and use their facilities.
#include <stdint.h> static int64_t const rounder = INT64_C(0x0000400000004000);
HTH, --Eljay
