adjacent_find example 2

int  main()  {
        list<int>  l;
        //  fill  values...
        list<int>::iterator  i  =  adjacent_find(
                  l.begin(),  l.end(),  sign_change);
        if  (i  !=  l.end())  {
                cout  <<  "sign  change:  "  <<  *i;
                i++;
                cout  <<  "  "  <<  *i  <<  endl;
        }
}