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[tang <>]

Dear all,

I am trying to do some modification to the example code:
http://doc.cgal.org/latest/Surface_mesh_simplification/Surface_mesh_simplification_2edge_collapse_constrained_polyhedron_8cpp-example.html

I try to change the Kernel from 
CGAL::Simple_cartesian<double> 
to 
CGAL::Exact_predicates_exact_constructions_kernel

As a result, I have the following modification in the example code:
1) line 4, changed 
#include <CGAL/Simple_cartesian.h>
to 
#include <CGAL/Exact_predicates_exact_constructions_kernel.h>

2) line 20, changed 
typedef CGAL::Simple_cartesian<double> Kernel;
to 
typedef CGAL::Exact_predicates_exact_constructions_kernel Kernel;

However, after modification, the following errors displayed:
error C2440: 'initializing' : cannot convert from
'CGAL::Null_functor::result_type' to 'CGAL::Lazy_exact_nt<ET_>'


Could anyone tell me how to modify the code to let it pass the compling and
building?

Thanks




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