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set::rbegin 和 set::rend

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說明如何使用 set::rbegin 和 set::rend Visual C++ 標準樣板程式庫 (STL) 函式。

template<class _K, class _Pr, class _A>
   class set 
   {
      public:
      // Function 1:
      const_reverse_iterator rbegin( ) const;
      // Function 2:
      const_reverse_iterator rend( ) const;
   }

備註

注意事項注意事項

在原型中的類別/參數名稱不相符的標頭檔中的版本。某些已修改以提高可讀性。

rbegin函式會傳回反向的雙向 iterator 受控制序列結尾之外，只要該點。 rend函式會傳回反向的雙向 iterator 那些點到達第一個序列的項目。

範例

// SetRbeginRend.cpp
// compile with: /EHsc
//
//      Illustrates how to use the rbegin function to get a reverse
//      bidirectional iterator that points just beyond the end of
//      the controlled sequence. It also illustrates how to use
//      the rend function to get a reverse bidirectional iterator
//      that points at the first element of the sequence.
//
// Functions:
//
//    rbegin      Returns a reverse bidirectional iterator that points
//                just beyond the end of the controlled sequence.
//    rend        Returns a reverse bidirectional iterator that points
//                at the first element of the sequence.
//
//////////////////////////////////////////////////////////////////////

#pragma warning(disable:4786)
#include <set>
#include <iostream>

using namespace std ;

typedef set<int> SET_INT;

int main() {
  SET_INT s1;
  SET_INT::reverse_iterator i;
  cout << "s1.insert(5)" << endl;
  s1.insert(5);
  cout << "s1.insert(10)" << endl;
  s1.insert(10);
  cout << "s1.insert(15)" << endl;
  s1.insert(15);
  cout << "s1.insert(20)" << endl;
  s1.insert(20);

  // displays: 20,15,10,5
  for (i=s1.rbegin();i!=s1.rend();i++)
     cout << "s1 has " << *i << " in its set." << endl;
}

Output

s1.insert(5)
s1.insert(10)
s1.insert(15)
s1.insert(20)
s1 has 20 in its set.
s1 has 15 in its set.
s1 has 10 in its set.
s1 has 5 in its set.

需求

標頭: <set>

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概念

標準樣板程式庫範例