基于8086的电子密码锁，用汇编实现

DATAS SEGMENT

    ;此处输入数据段代码  

    DOC DB 0DH, 0AH, '======================================='

    DB  0DH, 0AH, '| Simple password sysytem       |'

    DB  0DH, 0AH, '|    Copy Right By DDDDD 2014-3-28    |'

    DB 0DH, 0AH, '=======================================$'

    XING DB 0DH, 0AH, '*************************************$'

    SETPASS DB 0DH, 0AH, 'Please set your password:$'

    RESPASS DB 0DH, 0AH, 'Please set your password again:$'

    SORRY DB 0DH, 0AH, 'The two password you have set is not same!!!$'

    INPUT DB 0DH, 0AH, 'Please input your password:$'

    SUCCESS DB  0DH, 0AH, 'WOW! Your card has 10000 dollars!$'

    FAIL DB 0DH, 0AH, 'SORRY! your password is not right$'

    TWO DB  0DH, 0AH, 'YOU have only two chance now!$'

    ONE DB  0DH, 0AH, 'YOU have only one chance now!$'

    ZERO DB  0DH, 0AH, 'YOU have no chance now!$'

    PASS DB 7 ;设置密码 存放位置

    DB ?

    DB 7 DUP(?)

PASS1 DB 7 ;再次设置密码  存放位置

PASS2 DB 7 ;输入密码 存放位置

DATAS ENDS

STACKS SEGMENT

    ;此处输入堆栈段代码

STACKS ENDS

EXTRA SEGMENT

PASS11 DB 9 DUP(?)  ;PASS1 拷贝到PASS11

PASS22 DB 9 DUP(?)  ;PASS2 拷贝到PASS22

EXTRA ENDS

CODES SEGMENT

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

START:

    MOV AX, DATAS

    MOV DS, AX

    MOV AX, EXTRA

    MOV ES, AX

    ;此处输入代码段代码

    MOV AH, 9 ;9号功能，屏幕输出字符串

    LEA DX, DOC ;打印版权，将字符串首地址给DX

    INT 21H

    MOV AH, 9

    LEA DX, XING  ;打印*****

    MOV AH, 9H

    LEA DX, SETPASS ;打印Please set your password：

    MOV AH, 0AH ;0AH 等待输入字符串

    LEA DX, PASS ;设置密码，密码存放在PASS

    LEA DX, RESPASS ;打印Please set your password again：

    MOV AH, 0AH

    LEA DX, PASS1 ;再次设置密码，密码存放在PASS1

  CALL CMPPASS01 ;比较两次设置密码是否相同

  JE SAME

  MOV AH, 9H

  LEA DX, SORRY   ;两次设置密码不同，打印The two password you have set is not same!!!

  INT 21H

  JMP START

SAME: ;密码设置正确

    LEA DX, XING ;打印******

  LEA DX, INPUT   ;打印please input your password：

  INT 21H

  MOV AH, 0AH ;输入密码

  LEA DX, PASS2   ;密码存放在PASS2

  CALL CMPPASS02   ;比较输入的密码和设置的密码

  JE RMB ;相同，则会显示余额

  LEA DX, FAIL ;不相同提示失败，SORRY! your password is not right

  LEA DX, TWO ;还有2次机会，YOU have only two chance now!

  INT 21H 

    LEA DX, XING ;打印*******************

  MOV AH, 0AH

  LEA DX, PASS2 ;第二次输入密码，密码存放在PASS2

  CALL CMPPASS02 ;比较输入的密码和设置的密码

  LEA DX, ONE ;还有1次机会，YOU have only one chance now!

    LEA DX, XING ;打印**********

  LEA DX, PASS2 ;第三次输入密码，密码存放在PASS2

  LEA DX, ZERO ;没有机会了 you have no chance

JMP OVER

RMB:

    LEA DX, XING ;打印*****

MOV AH, 9H

LEA DX, SUCCESS ;显示余额 your card have 10000 dollars!

INT 21H  

OVER: 

    MOV AH,4CH

    INT 21H

CMPPASS01 PROC

LEA SI, PASS1 ;源地址PASS1

LEA DI, PASS11 ;目标地址PASS11

MOV CX, 9

CLD

REP MOVSB ;将输入的密码移动到附加段PASS11，字节移动，重复次数cx

LEA SI, PASS ;源地址PASS，数据段

LEA DI, PASS11 ;目标地址PASS11，附加段

REPE CMPSB ;比较输入的密码和设置的密码，字节比较重复次数cx，不等于会自动退出比较

RET

CMPPASS01 ENDP

CMPPASS02 PROC

LEA SI, PASS2

LEA DI, PASS22

LAST11:

MOVSB ;采用loop循环进行字节移动，循环次数cx

LOOP LAST11

LEA SI, PASS

LAST21:

CMPSB

JNE OVER11 ;发现不等于就跳出，不比较了

LOOP LAST21

OVER11:

CMPPASS02 ENDP

CODES ENDS

    END START