std::deque::empty

 

C++

Sprache

Concepts

Utilities-Bibliothek

Strings Bibliothek

Container-Bibliothek

Algorithmen-Bibliothek

Iteratoren Bibliothek

Numerik-Bibliothek

Input / Output-Bibliothek

Lokalisierungen Bibliothek

Reguläre Ausdrücke Bibliothek(C++11)

Atomare Operationen Bibliothek(C++11)

Thread Support-Bibliothek(C++11)

 

Container-Bibliothek

array (C++11)

vector

deque

forward_list (C++11)

list

set

multiset

map

multimap

unordered_set (C++11)

unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

stack

queue

priority_queue

 

std :: deque

Member-Funktionen Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

deque::deque

deque::~deque

deque::operator=

deque::assign

deque::get_allocator

Elementzugriff zerstört Original: Element access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

deque::front

deque::back

Iteratoren Original: Iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

deque::begin deque::cbegin (C++11)

deque::end deque::cend (C++11)

deque::rbegin deque::crbegin (C++11)

deque::rend deque::crend (C++11)

Kapazität Original: Capacity The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

deque::empty

deque::size

deque::max_size

deque::shrink_to_fit

Modifiers Original: Modifiers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

deque::clear

deque::insert

deque::emplace

deque::erase

deque::push_front

deque::emplace_front

deque::pop_front

deque::push_back

deque::emplace_back

deque::pop_back

deque::resize

deque::swap

 

bool empty()const;

Prüft, ob der Behälter keine Elemente, dh ob begin()== end() .

Original:

Checks if the container has no elements, i.e. whether begin()== end().

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Parameter

(None)

Original:

(none)

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Rückgabewert

true wenn der Behälter leer ist, false anders

Original:

true if the container is empty, false otherwise

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Ausnahmen

noexcept specification:  

noexcept

  (seit C++11)

Komplexität

Constant

Original:

Constant

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Beispiel

Der folgende Code verwendet empty, um zu überprüfen, ob ein std::deque<int> enthält alle Elemente:

Original:

The following code uses empty to check if a std::deque<int> contains any elements:

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <deque>#include <iostream>   int main(){std::deque<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

size	liefert die Anzahl der Elemente Original: returns the number of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion)