View Compilation Error

0_0_30170063_518.cpp: In function 'void strrev(char*)':
0_0_30170063_518.cpp:45:21: error: ambiguating new declaration of 'void strrev(char*)'
 void strrev(char s[]){
                     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/cstring:42:0,
                 from 0_0_30170063_518.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/string.h:113:17: note: old declaration 'char* strrev(char*)'
   char *__cdecl strrev(char *_Str) __MINGW_ATTRIB_DEPRECATED_MSVC2005;
                 ^