c++ bitset 用法

std::bitset

 

C++

 

Utilities library

 

std::bitset

 

Defined in header  <bitset>
template< std::size_t N > class bitset;

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.

bitset meets the requirements of CopyConstructible and CopyAssignable.

Template parameters

N

-

the number of bits to allocate storage for

Member types

reference

proxy class representing a reference to a bit  (class)

Member functions

(constructor)	constructs the bitset  (public member function)
operator==operator!=	compares the contents  (public member function)
Element access
operator[]	accesses specific bit  (public member function)
test	accesses specific bit  (public member function)
allanynone (C++11)	checks if all, any or none bits are set to true  (public member function)
count	returns the number of bits set to true  (public member function)
Capacity
size	returns the size number of bits that the bitset can hold  (public member function)
Modifiers
operator&=operator|=operator^=operator~	performs binary AND, OR, XOR and NOT  (public member function)
operator<<=operator>>=operator<<operator>>	performs binary shift left and shift right  (public member function)
set	sets bits to true or given value  (public member function)
reset	sets bits to false  (public member function)
flip	toggles the values of bits  (public member function)
Conversions
to_string	returns a string representation of the data  (public member function)
to_ulong	returns an unsigned long integer representation of the data  (public member function)
to_ullong (C++11)	returns an unsigned long long integer representation of the data  (public member function)

Non-member functions

operator&operator|operator^	performs binary logic operations on bitsets  (function template)
operator<<operator>>	performs stream input and output of bitsets  (function template)