View Compilation Error

0_0_18121337_20428.cpp:5:17: error: 'int floor [200001]' redeclared as different kind of symbol
 int floor[200001];
                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/cmath:44:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:38,
                 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_18121337_20428.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/math.h:154:18: note: previous declaration 'double floor(double)'
   double __cdecl floor(double _X);
                  ^