find_if example

bool  is_negative(int  i)  {
        return  (i  <  0);
}
int  main()  {
        list<int>  l;
        //  fill  values...
        list<int>::iterator  i  =  find_if(l.begin(),
                                     l.end(),  is_negative);
        if  (i  !=  l.end())
                cout  <<  "first  negative  is  "
                         <<  *i  <<  endl;
}