foo.c: In function 'buffer_left_move':
foo.c:15:5: warning: control reaches end of non-void function [-Wreturn-type]
     }
     ^
foo.c: In function 'main':
foo.c:17:6: warning: 'i' is used uninitialized in this function [-Wuninitialized]
 {int i,j;
      ^

自豪的采用jd5进行评测(github.com/masnn/jd5)