汇编从键盘输入数据并排序

DATA SEGMENT
A DB 100 dup(?)
MES01  DB 0AH,0DH,'Please Input the strings:','$'
MES02  DB 0AH,0DH,'Output the order:','$'
MES03  DB 0AH,0DH,'The Max:','$'
MES04  DB 0AH,0DH,'The Min:','$'
data ends

EXDA SEGMENT
B DB  100 DUP(?)
EXDA ENDS


code segment
assume cs:code, ds:data,es:exda
START:
       MOV AX, DATA
       MOV DS, AX
       MOV AX, EXDA
       MOV ES, AX
       LEA DX,MES01
       MOV AH,9
       INT 21H
       MOV AH, 1

STEP:  INT 21H
       CMP AL,0DH
       JZ OK
       MOV [BX], AL
       ADD BX, 1