reverse_iterator::operator++

增加 reverse_iterator 为以前的元素。

reverse_iterator<RandomIterator>& operator++( );
reverse_iterator<RandomIterator> operator++( int );

返回值

第一 preincremented reverse_iterator 运算符返回第二，postincrement 运算符返回，增加 reverse_iterator的副本。

备注

此成员函数满足 reverse_iterator，则一双向迭代器，以要求只能使用。

示例

// reverse_iterator_op_incr.cpp
// compile with: /EHsc
#include <iterator>
#include <vector>
#include <iostream>

int main( )
{
   using namespace std;
   int i;

   vector<int> vec;
   for ( i = 1 ; i < 6 ; ++i )  
   {
      vec.push_back ( 2 * i - 1 );
   }
   
   vector <int>::iterator vIter;
   cout << "The vector vec is: ( ";
   for ( vIter = vec.begin( ) ; vIter != vec.end( ); vIter++)
      cout << *vIter << " ";
   cout << ")." << endl;

   vector <int>::reverse_iterator rvIter;
   cout << "The vector vec reversed is: ( ";
   for ( rvIter = vec.rbegin( ) ; rvIter != vec.rend( ); rvIter++)
      cout << *rvIter << " ";
   cout << ")." << endl;

   // Initializing reverse_iterators to the last element
   vector <int>::reverse_iterator rVPOS1 = vec.rbegin( );
   
   cout << "The iterator rVPOS1 initially points to the first "
        << "element\n in the reversed sequence: "
        << *rVPOS1 << "." << endl;

   rVPOS1++;  // postincrement, preincrement: ++rVPSO1

   cout << "After incrementing, the iterator rVPOS1 points\n"
        << " to the second element in the reversed sequence: "
        << *rVPOS1 << "." << endl;
}

要求

头文件： <iterator>

命名空间: std

请参见

参考

reverse_iterator 类

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