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[gwenm <>]

Hi all
i tried to compile this short example cgal example 
#include <CGAL/basic.h>
#include

#include #include <CGAL/Cartesian.h> #include <CGAL/Segment_2.h> typedef CGAL::Point_2< CGAL::Cartesian > Point; typedef CGAL::Segment_2< CGAL::Cartesian > Segment; int main() { Point p(0,1), q(2,2); Segment s(p,q); CGAL::set_pretty_mode(std::cout); std::cout << p << std::endl << q << std::endl; std::ofstream f("data.txt"); //------------------>>>HERE CGAL::set_binary_mode(f); f << s << p ; return 1; } but the line annoted //>>>HERE sends an error LINK: msvcprtd.lib(MSVCP100D.dll) : error LNK2005: "public: class std::basic_ostream<char,struct std::char_traits<char> > & __thiscall std::basic_ostream<char,struct std::char_traits<char> >::operator<<(class std::basic_ostream<char,struct std::char_traits<char> > & (__cdecl*)(class std::basic_ostream<char,struct std::char_traits<char> > &))" (??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@P6AAAV01@AAV01@@Z@Z) already defined in CGAL_Core-vc100-mt-gd-4.0.lib(all_files.obj) can anyone tell me the problem ? thanks in advance gwenaelle

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