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

From cppreference.com
< cpp‎ | utility‎ | bitset
 
 
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(1)
bool operator==( const bitset& rhs ) const;
(until C++11)
bool operator==( const bitset& rhs ) const noexcept;
(since C++11)
(2)
bool operator!=( const bitset& rhs ) const;
(until C++11)
bool operator!=( const bitset& rhs ) const 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)

[edit] Parameters

rhs - bitset to compare

[edit] 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

[edit] Example

Compare given bitsets to determine if they are identical:

#include <iostream>
#include <bitset>
 
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