std::bitset<N>

• The class template bitset represents a fixed-size sequence of N bits.
• Bitsets can be manipulated by standard logic operators and converted to and from strings and integers.
• For the purpose of the string representation and of naming directions for shift operations, the sequence is thought of as having its lowest indexed elements at the right, as in the binary representation of integers.

Access

• test(idx)
• all()
• any()
• none()
• count()

Modifiers

• set(idx), reset(idx), flip(idx)

Logical operation

• &, |, ^, ~
• <<, >>

Conversion

• Note: std::overflow_error if the value can not be represented
• to_string
• to_ulong
• to_ullong

sizeof bitset?

• It's implementation defined, look at bitset header of your compiler.
• Potentially: 64-bit system: 8 * ((N + 63) / 64), e.g. align to every 8 bytes