Namespaces
Variants
Actions

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

From cppreference.com
< cpp‎ | utility‎ | bitset
 
 
Utilities library
General utilities
Relational operators (deprecated in C++20)
(C++20)(C++20)(C++20)  
(C++20)
(C++20)
(C++14)
(C++11)
(C++11)
(C++23)
(C++11)
(C++17)
Common vocabulary types
(C++11)
(C++17)
(C++17)
(C++17)
(C++11)
(C++17)
(C++23)


 
 
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)

[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:

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
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/utility/bitset/operator_cmp&oldid=171727"

AltStyle によって変換されたページ (->オリジナル) /