std::generate
Da cppreference.com.
<metanoindex/>
<tbody> </tbody>| Elemento definito nell'header <algorithm>
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template< class ForwardIt, class Generator > void generate( ForwardIt first, ForwardIt last, Generator g ); |
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Assegna ogni elemento nella gamma
[first, last) un valore generato dall'oggetto funzione data g. Original:
Assigns each element in range
[first, last) a value generated by the given function object g. The text has been machine-translated via Google Translate.
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Parametri
| first, last | - | l'intervallo di elementi da generare
Original: 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. | |||||||||
| g | - | generator function object that will be called. The signature of the function should be equivalent to the following: <tbody> </tbody>
The type | |||||||||
| Type requirements | |||||||||||
-ForwardIt must meet the requirements of ForwardIterator.
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Valore di ritorno
(Nessuno)
Original:
(none)
The text has been machine-translated via Google Translate.
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Complessità
Esattamente
std::distance(first, last) invocazioni di g() e le assegnazioni.Original:
Exactly
std::distance(first, last) invocations of g() and assignments.The text has been machine-translated via Google Translate.
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Possibile implementazione
template<class ForwardIt, class Generator>
void generate(ForwardIt first, ForwardIt last, Generator g)
{
while (first != last) {
*first++ = g();
}
}
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Esempio
Gli usi codice seguente riempie un vettore con numeri casuali:
Original:
The following code uses fills a vector with random numbers:
The text has been machine-translated via Google Translate.
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#include <algorithm>
#include <iostream>
#include <cstdlib>
int main()
{
std::vector<int> v(5);
std::generate(v.begin(), v.end(), std::rand); // Using the C function rand()
std::cout << "v: ";
for (auto iv: v) {
std::cout << iv << " ";
}
std::cout << "\n";
}
Output:
v: 52894 15984720 41513563 41346135 51451456