View Compilation Error

0_0_24017462_8179.cpp: In function 'int main()':
0_0_24017462_8179.cpp:9:23: error: too many arguments to function 'char* gets(char*)'
     while(gets("%s", a))
                       ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/cstdio:42:0,
                 from 0_0_24017462_8179.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/stdio.h:490:17: note: declared here
   char *__cdecl gets(char *_Buffer) __MINGW_ATTRIB_DEPRECATED_SEC_WARN;
                 ^