View Compilation Error

0_0_16458368_25986.c:9:6: error: conflicting types for 'getc'
 lint getc(int n,int m);
      ^
In file included from 0_0_16458368_25986.c:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/stdio.h:487:15: note: previous declaration of 'getc' was here
   int __cdecl getc(FILE *_File);
               ^
0_0_16458368_25986.c:52:6: error: conflicting types for 'getc'
 lint getc(int n,int m)
      ^
In file included from 0_0_16458368_25986.c:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/stdio.h:487:15: note: previous declaration of 'getc' was here
   int __cdecl getc(FILE *_File);
               ^