问个简单的问题(从键盘读入一行数据然后显示)

bx+1,bx+2了 BYTE PTR是字节操作了  当系统获取13时 会继续读下去 判断后面的是不是10如果是就执行回车

;终结版,嘿嘿有问题还是要自己哈,不过还是谢谢2楼的版主
DAT SEGMENT
STRING DB 100,0,100 DUP(?)
ENT DB 0AH,0DH,'$'
PRINTF DB 'INPUT A STING TO TEST!','$'
STAR DB '***************************THIS IS A DEVIDE LINE******************','$'
DAT ENDS
COD SEGMENT
ASSUME CS: COD,DS: DAT
STRAT:
MOV AX,DAT
MOV DS,AX
;Print a line to remind user
LEA DX,PRINTF
MOV AH,09H
INT 21H
LEA DX,ENT
MOV AH,09H
INT 21H
;
LEA DX,STRING
MOV AH,0AH
INT 21H
XOR CL,CL
MOV CL,STRING+1
XOR CH,CH
ADD DX,CX
MOV BX,DX
MOV BYTE PTR[BX+2],'$'
; ENTER NEXT LINE
LEA DX,ENT
MOV AH,09H
INT 21H
LEA DX,STAR
MOV AH,09H
INT 21H
LEA DX,ENT
MOV AH,09H
INT 21H
; PRINT THE LINE THAT USER TYPED
LEA DX,STRING+2
MOV AH,09H
INT 21H
MOV AH,4CH
INT 21H
COD ENDS
END