std::bsearch

 

C++

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正規表現ライブラリ(C++11)

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スレッドのサポートライブラリ(C++11)

 

アルゴリズムライブラリ

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.
シーケンス動作を非改変 Original: Non-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.
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
操作を仕切る Original: Partitioning operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_partitioned (C++11) partition partition_copy (C++11)	stable_partition partition_point (C++11)
（ソートされた範囲で）ソート操作 Original: Sorting operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_sorted (C++11) is_sorted_until (C++11) sort	partial_sort partial_sort_copy stable_sort nth_element
バイナリ検索操作（ソート範囲で） Original: Binary search operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
lower_bound upper_bound	binary_search equal_range
（ソートされた範囲で）操作を設定します Original: Set operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
merge inplace_merge includes	set_difference set_intersection set_symmetric_difference set_union
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is_heap is_heap_until (C++11) make_heap	push_heap pop_heap sort_heap
最小値/最大値操作 Original: Minimum/maximum operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
max max_element min min_element minmax (C++11) minmax_element (C++11)	lexicographical_compare is_permutation (C++11) next_permutation prev_permutation
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iota (C++11) accumulate inner_product	adjacent_difference partial_sum
Cライブラリ Original: C library The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
qsort	bsearch

 

Defined in header <cstdlib>
void* bsearch(constvoid* key, constvoid* ptr, size_t count, size_t size,                int(*comp)(constvoid*, constvoid*));

keyが指す配列内ptrが指す要素に等しい要素を検索します。配列はsizecountのsize要素が含まれています。関数はcompがオブジェクトの比較に使用される、によって指さ.

Original:

Finds an element equal to element pointed to by key in an array pointed to by ptr. The array contains count elements of size size. Function pointed to by comp is used for object comparison.

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パラメータ

key	-	を検索するための要素へのポインタ Original: pointer to the element to search for The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ptr	-	検討する配列へのポインタ Original: pointer to the array to examine The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
count	-	配列内の要素の数 Original: number of element in the array The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
size	-	バイト単位で配列内の各要素の大きさ Original: size of each element in the array in bytes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
comp	-	comparison function which returns ​a negative integer value if the first argument is less than the second, a positive integer value if the first argument is greater than the second and zero if the arguments are equal. key is passed as the first argument, an element from the array as the second. The signature of the comparison function should be equivalent to the following:  int cmp(constvoid*a, constvoid*b); The function must not modify the objects passed to it. ​

値を返します

見つかった要素または別の方法でNULLへのポインタ..

Original:

Pointer to the found element or NULL otherwise.

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例

このコードを実行します

#include <cstdlib>#include <iostream>   int compare(constvoid*ap, constvoid*bp){constint*a =(int*) ap;constint*b =(int*) bp;return*a -*b;}   int show_ptr(int*p){if(p ==NULL){std::cout<<"NULL\n";}else{std::cout<< p1 <<' '<<*p1 <<'\n';}}   int main(int argc, char**argv){constint ARR_SIZE =8;int arr[ARR_SIZE]={1, 2, 3, 4, 5, 6, 7, 8};   int key1 =4;int*p1 =(int*) std::bsearch(&key1, arr, ARR_SIZE, sizeof(arr[0]), compare);   int key2 =9;int*p2 =(int*) std::bsearch(&key2, arr, ARR_SIZE, sizeof(arr[0]), compare);   std::cout<<"p1: "; show_ptr(p1);   std::cout<<"p2: "; show_ptr(p2);}

出力:

p1: 0xbf9a4c88 4 p2: NULL

参照

qsort	ソートされていない型を持つ要素の範囲 Original: sorts a range of elements with unspecified type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数)
equal_range	特定のキーと一致する要素の範囲を返します Original: returns range of elements matching a specific key 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)
C documentation for bsearch