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      std::min

      提供: cppreference.com
      < cpp‎ | algorithm

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      C++
       
      アルゴリズムライブラリ
      機能します
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      Functions
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      シーケンス動作を非改変
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      Non-modifying sequence operations
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      シーケンス動作を変更する
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      Modifying sequence operations
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      操作を仕切る
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      Partitioning operations
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      （ソートされた範囲で）ソート操作
      Original:
      Sorting operations (on sorted ranges)
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      バイナリ検索操作（ソート範囲で）
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      Binary search operations (on sorted ranges)
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      （ソートされた範囲で）操作を設定します
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      Set operations (on sorted ranges)
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      ヒープ操作
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      Heap operations
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      最小値/最大値操作
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      Minimum/maximum operations
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      数値演算
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      Numeric operations
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      Cライブラリ
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      C library
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      ヘッダ <algorithm> で定義
      template<class T >
      const T& min(const T& a, const T& b );
      		 (1)
      template<class T, class Compare >
      const T& min(const T& a, const T& b, Compare comp );
      		 (2)
      template<class T >
      T min(std::initializer_list<T> ilist);
      		 (3) (C++11およびそれ以降)
      template<class T, class Compare >
      T min(std::initializer_list<T> ilist, Compare comp );
      		 (4) (C++11およびそれ以降)
      1-2)
      2つの値のうち小さい方を返します。.
      Original:
      Returns the smaller of the two values.
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      3-4)
      初期化子リストilist内の値の最小値を返します。.
      Original:
      Returns the smallest of the values in initializer list ilist.
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      （1,3）のバージョンでは値を比較するoperator<使用、（2,4）のバージョンは、指定された比較関数compを使用.
      Original:
      The (1,3) versions use operator< to compare the values, the (2,4) versions use the given comparison function comp.
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      目次

      [編集]パラメータ

      a, b -
      比較する値
      Original:
      the values to compare
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      ilist -
      比較するための値で初期化子リスト
      Original:
      initializer list with the values to compare
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      cmp - 比較関数. if a is less than b 場合、 ​trueを返します.

      比較関数のシグネチャは以下と同等でなければなりません.

       bool cmp(const Type1 &a, const Type2 &b);

      シグネチャはconstを含まなくても構いませんが, 比較関数は渡されたオブジェクトを変更してはなりません.
      型Type1及びType2はどちらも型Tから暗黙型変換可能な型でなければなりません. ​

      型の要件
      -
      T は LessThanComparable

      の要求を満足しなければなりません。 for the overloads (1) and (3)

      -
      T は CopyConstructible

      の要求を満足しなければなりません。 for the overloads (3) and (4)

      [編集]値を返します

      1-2)
      aの小さい方とb。値が等しい場合、返品a.
      Original:
      The smaller of a and b. If the values are equivalent, returns a.
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      3-4)
      ilistの最小値。いくつかの値が最小と同等である場合は、一番左のような値を返します。.
      Original:
      The smallest value in ilist. If several values are equivalent to the smallest, returns the leftmost such value.
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      [編集]複雑性

      1-2) 定数

      3-4)
      ilist.size()のリニア
      Original:
      Linear in ilist.size()
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      [編集]可能な実装

      First version 
      template<class T>const T& min(const T& a, const T& b){return(a < b)? a : b;}
      Second version 
      template<class T, class Compare>const T& min(const T& a, const T& b, Compare comp){return(comp(a, b))? a : b;}
      Third version 
      template<class T> T min(std::initializer_list<T> ilist){return*std::min_element(ilist.begin(), ilist.end());}
      Fourth version 
      template<class T, class Compare> T min(std::initializer_list<T> ilist, Compare comp){return*std::min_element(ilist.begin(), ilist.end(), comp);}

      [編集]例

      #include <algorithm>#include <iostream>   int main(){std::cout<<"smaller of 1 and 9999: "<< std::min(1, 9999)<<'\n';std::cout<<"smaller of 'a' and 'b': "<< std::min('a', 'b')<<'\n';std::cout<<"smaller of 3.5 and 2.5: "<< std::min(3.5, 2.5)<<'\n';}

      出力: 

      smaller of 1 and 9999: 1 smaller of 'a' and 'b': a smaller of 3.5 and 2.5: 2.5
      This section is incomplete

      [編集]参照

      二つの要素のうちの大きい方を返します
      Original:
      returns the larger of two elements
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      (関数テンプレート)[edit]
      (C++11)
      大きく2つの要素のうち小さい方を返します
      Original:
      returns the larger and the smaller of two elements
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      (関数テンプレート)[edit]
      範囲内の最小の要素を返します
      Original:
      returns the smallest element in a range
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      (関数テンプレート)[edit]
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