View Compilation Error

0_0_19217152_22616.cpp:14:4: error: stray '#' in program
  7 #define mod 7
    ^
0_0_19217152_22616.cpp:5:2: error: expected unqualified-id before numeric constant
  2 
  ^
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_19217152_22616.cpp:10:
GCC4.9.2/x86_64-w64-mingw32/include/math.h:17:32: error: expected declaration before end of line
 #pragma pack(push,_CRT_PACKING)
                                ^