std::generate_n

 

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正規表現ライブラリ (C++11)

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機能します Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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all_of any_of none_of (C++11) (C++11) (C++11) for_each count count_if mismatch equal	find find_if find_if_not (C++11) find_end find_first_of adjacent_find search search_n
シーケンス動作を変更する Original: Modifying sequence operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
copy copy_if (C++11) copy_n (C++11) copy_backward move (C++11) move_backward (C++11) fill fill_n transform generate generate_n remove remove_if remove_copy remove_copy_if	replace replace_if replace_copy replace_copy_if swap swap_ranges iter_swap reverse reverse_copy rotate rotate_copy random_shuffle shuffle   (C++11) unique unique_copy
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is_partitioned (C++11) partition partition_copy (C++11)	stable_partition partition_point (C++11)
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is_sorted (C++11) is_sorted_until (C++11) sort	partial_sort partial_sort_copy stable_sort nth_element
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merge inplace_merge includes	set_difference set_intersection set_symmetric_difference set_union
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qsort	bsearch

 

Defined in header <algorithm>
template< class OutputIt, class Size, class Generator > void generate_n( OutputIt first, Size count, Generator g ); template< class OutputIt, class Size, class Generator > OutputIt generate_n( OutputIt first, Size count, Generator g );		(C + + 11時まで) (C + + 11以来)

g場合、countで範囲の先頭で最初first要素に、指定された関数オブジェクトcount>0によって生成された値を、代入します。そうでなければ何もしません.

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.

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パラメータ

first	-	生成する要素の範囲の先頭 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	-	生成する要素の数 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: Ret fun(); 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.

値を返します

（なし）(C + + 11時まで)

Original:

(none) (C + + 11時まで)

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count>0、firstそうでない場合、割り当てられた最後の要素の反復子1。 (C + + 11以来)

Original:

Iterator one past the last element assigned if count>0, first otherwise. (C + + 11以来)

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複雑

count用g()および割り当ての正確count>0呼び出し、.

Original:

Exactly count invocations of g() and assignments, for count>0.

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可能な実装

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; }

例

次のコードは、乱数を整数の配列を埋め.

Original:

The following code fills an array of integers with random numbers.

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#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

も参照してください

fill_n	要素の数に値を代入します 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. (関数テンプレート)
generate	範囲内の関数の結果を保存します 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. (関数テンプレート)