reverse_iterator::operator+

Adds an offset to an iterator and returns the new reverse_iterator addressing the inserted element at the new offset position.

reverse_iterator<RandomIterator> operator+(
   difference_type _Off
) const;

Parameters

• _Off
  The offset to be added to the reverse iterator.

Return Value

A reverse_iterator addressing the offset element.

Remarks

This member function may only be used if the reverse_iterator satisfies the requirements for a random-access iterator.

Example

// reverse_iterator_op_add.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 );
   }
   
   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 first 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;

   vector <int>::reverse_iterator rVPOS2 =rVPOS1 + 2; // offset added
   cout << "After the +2 offset, the iterator rVPOS2 points\n"
        << " to the 3rd element in the reversed sequence: "
        << *rVPOS2 << "." << endl;
}

The vector vec is: ( 2 4 6 8 10 ). The vector vec reversed is: ( 10 8 6 4 2 ). The iterator rVPOS1 initially points to the first element in the reversed sequence: 10. After the +2 offset, the iterator rVPOS2 points to the 3rd element in the reversed sequence: 6.

Requirements

Header: <iterator>

Namespace: std

See Also

Reference

reverse_iterator Class

Standard Template Library

Other Resources

reverse_iterator Members