std::vector::back
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<tbody> </tbody> reference back(); |
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const_reference back() const; |
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Gibt Bezugnahme auf das letzte Element in dem Behlter .
Original:
Returns reference to the last element in the container.
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Aufruf
back auf einem leeren Behlter undefined .Original:
Calling
back on an empty container is undefined.The text has been machine-translated via Google Translate.
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Parameter
(None)
Original:
(none)
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Rckgabewert
Bezugnahme auf das letzte Element
Original:
reference to the last element
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Komplexitt
Constant
Original:
Constant
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Notes
Fr einen Behlter
c ist die Expression return c.back(); entspricht { auto tmp = c.end(); --tmp; return *tmp; }Original:
For a container
c, the expression return c.back(); is equivalent to { auto tmp = c.end(); --tmp; return *tmp; }The text has been machine-translated via Google Translate.
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Beispiel
Der folgende Code verwendet
back um das letzte Element einer std::vector<char> anzuzeigen:
Original:
The following code uses
back to display the last element of a std::vector<char>:
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#include <vector>
#include <iostream>
int main()
{
std::vector<char> letters {'o', 'm', 'g', 'w', 't', 'f'};
if (!letters.empty()) {
std::cout << "The last character is: " << letters.back() << '\n';
}
}
Output:
The last character is f
Siehe auch
Zugriff auf das erste Element Original: access the first element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (ffentliche Elementfunktion) | |