std::array::front
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<metanoindex/>
<tbody> </tbody> reference front(); |
(seit C++11) | |
const_reference front() const; |
(seit C++11) | |
Eine Referenz auf das erste Element in dem Behlter .
Original:
Returns a reference to the first element in the container.
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Aufruf
front auf einem leeren Behlter undefined .Original:
Calling
front 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
Verweisen auf das erste Element
Original:
reference to the first element
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Komplexitt
Constant
Original:
Constant
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Notes
Fr einen Behlter
c ist die Expression c.front() entspricht *c.begin() .Original:
For a container
c, the expression c.front() is equivalent to *c.begin().The text has been machine-translated via Google Translate.
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Beispiel
Der folgende Code verwendet
front um das erste Element einer std::array<char> anzuzeigen:
Original:
The following code uses
front to display the first element of a std::array<char>:
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#include <array>
#include <iostream>
int main()
{
std::array<char> letters {'o', 'm', 'g', 'w', 't', 'f'};
if (!letters.empty()) {
std::cout << "The first character is: " << letters.front() << '\n';
}
}
Output:
The first character is o
See also
| Zugriff auf das letzte Element (ffentliche Elementfunktion) | |