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View Compilation Error

0_0_16379325_10991.cpp: In function 'bool cmp(const seg&, const seg&)':
0_0_16379325_10991.cpp:31:35: error: reference to 'less' is ambiguous
         if(!same(a.k,b.k)) return less(a.k,b.k);
                                   ^
0_0_16379325_10991.cpp:21:6: note: candidates are: bool less(double, double)
 bool less(double a,double b)
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:48:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_16379325_10991.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:367:12: note:                 template<class _Tp> struct std::less
     struct less : public binary_function<_Tp, _Tp, bool>
            ^
0_0_16379325_10991.cpp:32:34: error: reference to 'less' is ambiguous
         if(same(a.b,b.b)) return less(a.x1,b.x1);
                                  ^
0_0_16379325_10991.cpp:21:6: note: candidates are: bool less(double, double)
 bool less(double a,double b)
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:48:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_16379325_10991.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:367:12: note:                 template<class _Tp> struct std::less
     struct less : public binary_function<_Tp, _Tp, bool>
            ^
0_0_16379325_10991.cpp:33:16: error: reference to 'less' is ambiguous
         return less(a.b,b.b);
                ^
0_0_16379325_10991.cpp:21:6: note: candidates are: bool less(double, double)
 bool less(double a,double b)
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:48:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_16379325_10991.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:367:12: note:                 template<class _Tp> struct std::less
     struct less : public binary_function<_Tp, _Tp, bool>
            ^
0_0_16379325_10991.cpp:37:37: error: reference to 'less' is ambiguous
         if(!same(a.x1,b.x1)) return less(a.x1,b.x1);
                                     ^
0_0_16379325_10991.cpp:21:6: note: candidates are: bool less(double, double)
 bool less(double a,double b)
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:48:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_16379325_10991.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:367:12: note:                 template<class _Tp> struct std::less
     struct less : public binary_function<_Tp, _Tp, bool>
            ^
0_0_16379325_10991.cpp:38:16: error: reference to 'less' is ambiguous
         return less(a.y1,b.y1);
                ^
0_0_16379325_10991.cpp:21:6: note: candidates are: bool less(double, double)
 bool less(double a,double b)
      ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:48:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_16379325_10991.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:367:12: note:                 template<class _Tp> struct std::less
     struct less : public binary_function<_Tp, _Tp, bool>
            ^


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