0_0_23050689_29017.cpp: In function 'bool cmp(SPoint, SPoint)':
0_0_23050689_29017.cpp:33:14: error: reference to 'minus' is ambiguous
SPoint va = minus(a, points[0]);
^
0_0_23050689_29017.cpp:17:8: note: candidates are: SPoint minus(SPoint, SPoint)
SPoint minus(SPoint a, SPoint 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++/random:40,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
from 0_0_23050689_29017.cpp:6:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:176:12: note: template<class _Tp> struct std::minus
struct minus : public binary_function<_Tp, _Tp, _Tp>
^
0_0_23050689_29017.cpp:34:14: error: reference to 'minus' is ambiguous
SPoint vb = minus(b, points[0]);
^
0_0_23050689_29017.cpp:17:8: note: candidates are: SPoint minus(SPoint, SPoint)
SPoint minus(SPoint a, SPoint 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++/random:40,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
from 0_0_23050689_29017.cpp:6:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:176:12: note: template<class _Tp> struct std::minus
struct minus : public binary_function<_Tp, _Tp, _Tp>
^
0_0_23050689_29017.cpp: In function 'void getConvexHull()':
0_0_23050689_29017.cpp:55:15: error: reference to 'minus' is ambiguous
SPoint v1 = minus(points[index], points[index - 1]);
^
0_0_23050689_29017.cpp:17:8: note: candidates are: SPoint minus(SPoint, SPoint)
SPoint minus(SPoint a, SPoint 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++/random:40,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
from 0_0_23050689_29017.cpp:6:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:176:12: note: template<class _Tp> struct std::minus
struct minus : public binary_function<_Tp, _Tp, _Tp>
^
0_0_23050689_29017.cpp:56:15: error: reference to 'minus' is ambiguous
SPoint v2 = minus(points[i], points[index]);
^
0_0_23050689_29017.cpp:17:8: note: candidates are: SPoint minus(SPoint, SPoint)
SPoint minus(SPoint a, SPoint 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++/random:40,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
from 0_0_23050689_29017.cpp:6:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_function.h:176:12: note: template<class _Tp> struct std::minus
struct minus : public binary_function<_Tp, _Tp, _Tp>
^
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