View Compilation Error

0_0_17344634_17925.cpp: In function 'int ceil(double)':
0_0_17344634_17925.cpp:25:21: error: ambiguating new declaration of 'int ceil(double)'
 int ceil (double num)
                     ^
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_17344634_17925.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/math.h:153:18: note: old declaration 'double ceil(double)'
   double __cdecl ceil(double _X);
                  ^