operator+ (<iterator>)

向迭代器的偏移量并返回 move_iterator 或 reverse_iterator 解决该插入的元素在新的偏移位置。

template<class RandomIterator, class Diff>
    move_iterator<RandomIterator> operator+(
        Diff _Off,
        const move_iterator<RandomIterator>& _Right
    );
template<class RandomIterator>
    reverse_iterator<RandomIterator> operator+(
        Diff _Off,
        const reverse_iterator<RandomIterator>& _Right
    );

参数

• _Off
  位置的数量const move_iterator或常数reverse_iterator是偏移量。

• _Right
  是的迭代器偏移量。

返回值

返回总和 _Right + _Off。

示例

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

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

   vector<int> vec;
   for (i = 0 ; i < 6 ; ++i )  {
      vec.push_back ( 2 * i );
      }
   
   vector <int>::iterator vIter;

   cout << "The initial vector vec is: ( ";
   for ( vIter = vec.begin( ) ; vIter != vec.end( ); vIter++)
      cout << *vIter << " ";
   cout << ")." << endl;

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

   vector<int>::difference_type diff = 4;
   rVPOS1 = diff +rVPOS1;

   cout << "The iterator rVPOS1 now points to the fifth "
           << "element\n in the reversed sequence: "
           << *rVPOS1 << "." << endl;
}

要求

标头: <iterator>

命名空间: std

请参见

参考

标准模板库