init:
COPYFROM 24
COPYTO   20
COPYTO   19
COPYTO   18

start:
INBOX
COPYTO   [20]
JUMPZ    sortpre
BUMPUP   20
JUMP     start

sortpre:
BUMPDN   20
COPYTO   22
JUMPZ    out

sort:
COPYFROM [20]
COPYTO   23
COPYFROM 20
COPYTO   21
-- 19号存储已经排序的数量，20号如果和19号相等，就不需要在往前比较了，从结尾重新开始一轮冒泡
SUB      19
JUMPZ    next
BUMPDN   20
JUMPN    next
COPYFROM 23
SUB      [20]
JUMPN    bubble
JUMP     sort

bubble:
COPYFROM [20]
COPYTO   [21]
COPYFROM 23
COPYTO   [20]
JUMP     sort

next:
BUMPUP   19
SUB      22
JUMPZ    out
COPYFROM 22
COPYTO   20
JUMP     sort

out:
COPYFROM [18]
JUMPZ    init
OUTBOX
BUMPUP   18
JUMP     out