/in/foo.cc:4:17: error: ISO C++ forbids declaration of 'MoveLeft' with no type [-fpermissive]
 MoveLeft(int a[])
                 ^
/in/foo.cc: In function 'int MoveLeft(int*)':
/in/foo.cc:7:1: warning: no return statement in function returning non-void [-Wreturn-type]
 } 
 ^