改好了：

DATAS SEGMENT

A DB 9 ;10

DB ?,10 DUP("$")

H DB 10,13,"$"

MSG DB "INPUT: $"

MSG1 DB "NO!$";此處輸入資料段程式碼

DATAS ENDS

STACKS SEGMENT

;此處輸入堆疊段程式碼

STACKS ENDS

CODES SEGMENT

ASSUME CS:CODES,DS:DATAS,SS:STACKS

START:

MOV AX,DATAS

MOV DS,AX

LEA DX,H

MOV AH,9

INT 21H ;輸出回車鍵

LEA DX,A

MOV AH,10

INT 21H;鍵盤輸入

LEA DX,H

MOV AH,9

INT 21H ;輸出回車鍵

LEA dx,A ;AX,A

add dx,2

MOV AH,9

INT 21H ;輸出A值

LEA DX,H

MOV AH,9

INT 21H ;輸出回車鍵

mov ah,7

int 21h

MOV AH,4CH

INT 21H

CODES ENDS

END START