NAME¶

std::bitset::operator==,std::bitset::operator!= - std::bitset::operator==,std::bitset::operator!=

Synopsis¶

bool operator==( const bitset& rhs ) const; (1) (noexcept since C++11)
(constexpr since C++23)
bool operator!=( const bitset& rhs ) const; (2) (noexcept since C++11)
(until C++20)

1) Returns true if all of the bits in *this and rhs are equal.
2) Returns true if any of the bits in *this and rhs are not equal.

The != operator is synthesized from operator==. (since C++20)

Parameters¶

rhs - bitset to compare

Return value¶

1) true if the value of each bit in *this equals the value of the corresponding bit
in rhs, otherwise false.
2) true if !(*this == rhs), otherwise false.

Example¶

Compare given bitsets to determine if they are identical:

// Run this code

#include <bitset>
#include <iostream>

int main()
{
std::bitset<4> b1(0b0011);
std::bitset<4> b2(b1);
std::bitset<4> b3(0b0100);

std::cout << std::boolalpha;
std::cout << "b1 == b2: " << (b1 == b2) << '\n';
std::cout << "b1 == b3: " << (b1 == b3) << '\n';
std::cout << "b1 != b3: " << (b1 != b3) << '\n';

// b1 == std::bitset<3>{}; // compile-time error: incompatible types
}

Output:¶

b1 == b2: true
b1 == b3: false
b1 != b3: true