template <class CharT, class Traits, size_t N> std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os, const bitset<N>& x); | (1) | |
template <class CharT, class Traits, size_t N> std::basic_istream<CharT, Traits>& operator>>(std::basic_istream<CharT, Traits>& is, bitset<N>& x); | (2) |
Inserts or extracts a bitset from a character stream.
x
to the character stream os
as if by first converting it to a basic_string<CharT,Traits>
using to_string()
, and then writing it into os
using the operator<<
(which is a FormattedOutputFunction for strings). The characters to use for ones and zeroes are obtained from the currently-imbued locale by calling std::use_facet<std::ctype<CharT>(os.getloc()).widen()
with '1'
and '0'
as arguments.N
characters from is
and stores the characters in the bitset x
.Characters are extracted until either.
N
characters have been read, is
, or is.widen('0')
nor is.widen('1')
. If no characters are extracted, is.setstate(ios_base::failbit)
is called.
os | - | the character stream to write to |
is | - | the character stream to read from |
x | - | the bitset to be read or written |
The character stream that was operated on, e.g. os
or is
.
#include <bitset> #include <iostream> #include <sstream> int main() { std::string bit_string = "001101"; std::istringstream bit_stream(bit_string); std::bitset<3> b1; bit_stream >> b1; // reads "001", stream still holds "101" std::cout << b1 << '\n'; std::bitset<8> b2; bit_stream >> b2; // reads "101", populates the 8-bit set as "00000101" std::cout << b2 << '\n'; }
Output:
001 00000101
performs binary shift left and shift right (public member function) |
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