l1: unsigned long long a; l2: cout << sizeof(a) << endl; l3: a = 1281474976710655; l4: cout << a << endl; When we trying to compile such code with gcc++, it's throw error that the constant '1281474976710655' is too large for long long, it is only 2**48-1, when max number for unsigned long long is 2**64. This code compiles normal when we use Microsoft compiler. gcc (GCC) 4.1.2 20070925 (Red Hat 4.1.2-33)
