C++ STL: bitset

C++ STL: Bitset:-

A bitset stores bits. Can be imagined as an array of bool elements, but space-optimized. Each element occupies only one bit.

You can declare a bitset as follows 

bitset<length> bits;

Each bit can be accessed individually.  bits[0], gives the first bit of the sequence(isn't it analogous to arrays).

Imp: Bitset has the features of being able to be constructed from and converted to both integer values and binary strings.

to_ulong and to_string are used to do so.

The size of bitset is fixed at compile time(you need to pass it at the time of writing the code).

Member functions:

Bit access

• count: count bits in the set.
• size: returns the size
• test(location): return 1 if the bit at the "location" is set else return zero.
• any: test if any bit is set.
• none: test if no bit is set.
• all: test if all bits are set.

Bit operations

• set: set bits
• reset: reset bits
• flip: flip bits
• to_string: convert to string
• to_ulong: convert to an unsigned long integer
• to_ullong: convert to unsigned long long

Here is the link to the official documentation for bitsets: http://www.cplusplus.com/reference/bitset/bitset/