/in/foo.c: In function 'main':
/in/foo.c:11:2: warning: implicit declaration of function 'MoveLeft' [-Wimplicit-function-declaration]
  MoveLeft(n,k,a);
  ^~~~~~~~
/in/foo.c: At top level:
/in/foo.c:15:6: warning: conflicting types for 'MoveLeft'
 void MoveLeft(int n,int k,int a[])
      ^~~~~~~~
/in/foo.c:11:2: note: previous implicit declaration of 'MoveLeft' was here
  MoveLeft(n,k,a);
  ^~~~~~~~