std::vector::operator[]

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reference operator[]( size_type pos );
const_reference operator[]( size_type pos ) const;

Gibt einen Verweis auf das Element an der angegebenen Stelle pos. Keine Grenzen Überprüfung durchgeführt wird .

Original:

Returns a reference to the element at specified location pos. No bounds checking is performed.

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Parameter

pos

-

Position des Elements, um zurückzukehren Original: position of the element to return The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Rückgabewert

Verweis auf das angeforderte Element

Original:

reference to the requested element

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Komplexität

Constant

Original:

Constant

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Beispiel

Der folgende Code verwendet operator[] lesen und schreiben zu einem std::vector<int>:

Original:

The following code uses operator[] read from and write to a std::vector<int>:

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#include <vector>
#include <iostream>
 
int main()
{
    std::vector<int> numbers {2, 4, 6, 8};

    std::cout << "Second element: " << numbers[1] << '\n';

    numbers[0] = 5;

    std::cout << "All numbers:";
    for (auto i : numbers) {
        std::cout << ' ' << i;
    }
    std::cout << '\n';
}

Output:

Second element: 4
All numbers: 5 4 6 8

Siehe auch

at	Zugriff auf angegebene Element mit Überprüfung von Grenzen Original: access specified element with bounds checking The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion)