std::fill_n
De cppreference.com
 [] |
This page has been machine-translated from the English version of the wiki using Google Translate.
The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here. |
![[]](https://upload.cppreference.com/mwiki/images/3/31/Imbox_notice.png){kind=link}
<metanoindex/>
<tbody> </tbody>| Dclar dans l'en-tte <algorithm>
|
||
template< class OutputIt, class Size, class T > void fill_n( OutputIt first, Size count, const T& value ); template< class OutputIt, class Size, class T > OutputIt fill_n( OutputIt first, Size count, const T& value ); |
(avant C++11) (depuis C++11) |
|
Affecte la valeur donne
value les lments count premiers pas dans la gamme dbutant first si count>0. Ne fait rien autrement .Original:
Assigns the given value
value to the first count elements in the range beginning at first if count>0. Does nothing otherwise.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Paramtres
| first | - | le dbut de la srie d'lments modifier
Original: the beginning of the range of elements to modify The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| count | - | nombre d'lments modifier
Original: number of elements to modify The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| value | - | la valeur affecter
Original: the value to be assigned The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| Type requirements | ||
-OutputIt must meet the requirements of OutputIterator.
| ||
Retourne la valeur
(Aucun) (avant C++11)
Original:
(none) (avant C++11)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Iterator une aprs le dernier lment affect si
count>0, first autrement. (depuis C++11)Original:
Iterator one past the last element assigned if
count>0, first otherwise. (depuis C++11)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Complexit
Exactement missions
count, pour count>0 .Original:
Exactly
count assignments, for count>0.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Mise en uvre possible
template<class OutputIt, class Size, class T>
OutputIt fill_n(OutputIt first, Size count, const T& value)
{
for (Size i = 0; i < count; i++) {
*first++ = value;
}
return first;
}
|
Exemple
Le code suivant utilise
fill_n() d'affecter -1 au premier semestre un vecteur d'entiers:
Original:
The following code uses
fill_n() to assign -1 to the first half of a vector of integers:
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
#include <algorithm>
#include <vector>
#include <iostream>
int main()
{
std::vector<int> v1{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
std::fill_n(v1.begin(), 5, -1);
for (vector<int>::iterator it = v1.begin(); it != v1.end(); ++it) {
std::cout << *it << " ";
}
std::cout << "\n";
}
Rsultat :
-1 -1 -1 -1 -1 5 6 7 8 9
Voir aussi
attribue un ensemble d'lments d'une certaine valeur Original: assigns a range of elements a certain value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction gnrique) | |