C++ bitset to_ullong() Function
C++ bitset to_ullong() is used to convert the contents of the bitset to an unsigned long long integer. It returns an unsigned long long with the integer value that has the same bits set as the bitset.
It does not take any parameter.
It returns an Integer value with the same bit representation as the bitset object.
1111 as an integer is : 15
111111 as an integer is : 63