std::vector::size – cppreference.com

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Returns the number of elements in the container, i.e. std::distance(begin(), end()).

Parameter

(None)

Original:

(none)

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Rückgabewert

die Anzahl der Elemente in dem Behälter

Original:

the number of elements in the container

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Ausnahmen

Komplexität

Constant

Beispiel

The following code uses size to display the number of elements in a std::vector<int>:

#include <vector>
#include <iostream>
 
int main()
{
    std::vector<int> nums {1, 3, 5, 7};
 
    std::cout << "nums contains " << nums.size() << " elements.\n";
}

Output:

nums contains 4 elements.

Siehe auch


capacity	gibt die Anzahl der Elemente, die in derzeit zugewiesenen Speicher gehalten werden kann Original: returns the number of elements that can be held in currently allocated storage The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) [edit]

empty	prüft, ob der Container leer ist Original: checks whether the container is empty The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) [edit]

max_size	gibt die maximal mögliche Anzahl von Elementen Original: returns the maximum possible 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) [edit]

resize	ändert die Anzahl der gespeicherten Elemente (öffentliche Elementfunktion) [edit]