std::generate_n
Aus 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. |
| definiert in Header <algorithm>
|
||
| template< class OutputIt, class Size, class Generator > void generate_n( OutputIt first, Size count, Generator g ); |
(bis C + +11) (seit C++11) |
|
Werte zuweist, erzeugt durch gegebene Funktion Objekt
g, um den ersten count Elemente im Bereich beginnend bei first, wenn count>0. Tut nichts anderes .Original:
Assigns values, generated by given function object
g, 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.
Inhaltsverzeichnis |
[Bearbeiten] Parameter
| first | - | der Beginn des Bereichs von Elementen zu erzeugen
Original: the beginning of the range of elements to generate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. | |||||||||
| count | - | Einige der Elemente zu erzeugen
Original: number of the elements to generate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. | |||||||||
| g | - | generator function object that will be called. The signature of the function should be equivalent to the following:
The type Ret must be such that an object of type OutputIt can be dereferenced and assigned a value of type Ret. | |||||||||
| Type requirements | |||||||||||
-OutputIt must meet the requirements of OutputIterator.
| |||||||||||
[Bearbeiten] Rückgabewert
(None) (bis C + +11)
Original:
(none) (bis 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 ein nach dem letzten Element, wenn
count>0, first anderweitig zugeordnet. (seit C++11)Original:
Iterator one past the last element assigned if
count>0, first otherwise. (seit 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.
[Bearbeiten] Komplexität
Genau
count Anrufungen g() und Zuweisungen für count>0 .Original:
Exactly
count invocations of g() and 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.
[Bearbeiten] Mögliche Implementierung
template< class OutputIt, class Size, class Generator > OutputIt generate_n( OutputIt first, Size count, Generator g ) { for( Size i = 0; i < count; i++ ) { *first++ = g(); } return first; } |
[Bearbeiten] Beispiel
Der folgende Code füllt ein Array von Ganzzahlen mit Zufallszahlen .
Original:
The following code fills an array of integers with random numbers.
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 <cstddef> #include <cstdlib> #include <iostream> #include <iterator> #include <algorithm> int main() { const std::size_t N = 5; int ar[N]; std::generate_n(ar, N, std::rand); // Using the C function rand() std::cout << "ar: "; std::copy(ar, ar+N, std::ostream_iterator<int>(std::cout, " ")); std::cout << "\n"; }
Output:
52894 15984720 41513563 41346135 51451456
[Bearbeiten] Siehe auch
| weist einen Wert auf eine Reihe von Elementen Original: assigns a value to a 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. (Funktions-Template) | |
| speichert das Ergebnis einer Funktion in einem Bereich Original: saves the result of a function in a range The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) | |
