View Compilation Error

0_0_19448226_10895.cpp: In function 'int main()':
0_0_19448226_10895.cpp:11:17: error: invalid conversion from 'char' to 'char*' [-fpermissive]
         strlwr(c);
                 ^
In file included from 0_0_19448226_10895.cpp:2:0:
GCC4.9.2/x86_64-w64-mingw32/include/string.h:101:17: note: initializing argument 1 of 'char* strlwr(char*)'
   char *__cdecl strlwr(char *_Str) __MINGW_ATTRIB_DEPRECATED_MSVC2005;
                 ^