NAME¶

std::bitset::set - std::bitset::set

Synopsis¶

bitset& set(); (until C++11)
bitset& set() noexcept; (since C++11)
(until C++23)
constexpr bitset& set() noexcept; (1) (since C++23)
bitset& set( std::size_t pos, bool value = true (until C++23)
); (2)
constexpr bitset& set( std::size_t pos, bool (since C++23)
value = true );

Sets all bits to true or to specified value.

1) Sets all bits to true.
2) Sets the bit at position pos to the value value.

Parameters¶

pos - the position of the bit to set (least significant to most significant)
value - the value to set the bit to

Return value¶

*this

Exceptions¶

2) Throws std::out_of_range if pos does not correspond to a valid position within
the bitset.

Example¶

// Run this code

#include <iostream>
#include <bitset>

int main()
{
std::bitset<8> b;
std::cout << b << '\n';
std::cout << b.set() << '\n';
std::cout << b.reset() << '\n';

for (size_t i = 1; i < b.size(); i += 2) {
b.set(i);
}
std::cout << b << '\n';
}

Output:¶

00000000
11111111
00000000
10101010

See also¶

reset sets bits to false
(public member function)
flip toggles the values of bits
(public member function)