swap_ranges example

 int  main()  {
         int  a[ ]  =  {1, 2, 3, 4, 5};
         vector<int>  v;
         for  (int  i = 1;  i <= 5;  ++i)
                 v.push_back(i * 10);
         swap_ranges(v.begin(),  v.end(),  a);
 }