View Compilation Error

0_0_16871611_28522.cpp: In function 'void init()':
0_0_16871611_28522.cpp:22:11: error: reference to 'minus' is ambiguous
  change = minus = 0;
           ^
0_0_16871611_28522.cpp:14:12: note: candidates are: int minus
 int change,minus;
            ^
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_16871611_28522.cpp:1:
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>
            ^