std::unordered_multiset::empty – cppreference.com
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(seit C++11) | |
Prüft, ob der Behälter keine Elemente, dh ob begin() == end() .
Original:
Checks if the container has no elements, i.e. whether begin() == end().
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Parameter
(None)
Original:
(none)
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Rückgabewert
true wenn der Behälter leer ist, false anders
Original:
true if the container is empty, false otherwise
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Ausnahmen
Komplexität
Constant
Original:
Constant
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Beispiel
Der folgende Code verwendet empty, um zu überprüfen, ob ein std::unordered_multiset<int> enthält alle Elemente:
Original:
The following code uses empty to check if a std::unordered_multiset<int> contains any elements:
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#include <unordered_multiset> #include <iostream> int main() { std::unordered_multiset<int> numbers; std::cout << "Initially, numbers.empty(): " << numbers.empty() << '\n'; numbers.push_back(42); numbers.push_back(13317); std::cout << "After adding elements, numbers.empty(): " << numbers.empty() << '\n'; }
Output:
Initially, numbers.empty(): 1 After adding elements, numbers.empty(): 0
See also
liefert die Anzahl der Elemente Original: returns the number of elements The text has been machine-translated via Google Translate. (öffentliche Elementfunktion) [edit] | |