CGAL 5.3 - Manual
Convex_hull_2/convex_hull_yz.cpp
#include <iostream>
#include <iterator>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Projection_traits_yz_3.h>
#include <CGAL/convex_hull_2.h>
typedef K::Point_2 Point_2;
int main()
{
std::istream_iterator< Point_2 > input_begin( std::cin );
std::istream_iterator< Point_2 > input_end;
std::ostream_iterator< Point_2 > output( std::cout, "\n" );
CGAL::convex_hull_2( input_begin, input_end, output, K() );
return 0;
}