std::bitset<N>::operator==, std::bitset<N>::operator!=

std::bitset<N>::operator==, std::bitset<N>::operator!= - cppreference.com

From cppreference.com

`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

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:

#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