简单汇编----输入密码判断正否

 

DATAS SEGMENT
	 OUT_WEL   DB 0DH,0AH,'please input the password:$'     	 
     OUT_WRONG DB 0DH,0AH,'your input is wrong!$'
     OUT_RIGHT DB 0DH,0AH,'OK!$'
     INPUT DB 100
           DB ?
           DB 9 DUP(?) 
DATAS ENDS

EXTRA SEGMENT
	 PASSWORD DB 'WELCOME!'  
EXTRA ENDS

CODES SEGMENT
    ASSUME CS:CODES,DS:DATAS,ES:EXTRA
START:
    MOV AX,DATAS
    MOV DS,AX
    MOV AX,EXTRA
    MOV ES,AX
    
AGAIN:
	MOV CL,08H
    MOV DX,OFFSET OUT_WEL
    MOV AH,09H
    INT 21H
    ;
    MOV DX,OFFSET INPUT
    MOV AH,0AH
    INT 21H
    ;
    MOV SI,OFFSET INPUT+2
    MOV DI,OFFSET PASSWORD
    CLD
    REPZ CMPSB
    JNZ WRONG
RIGHT:
	;;;OUTPUT 'RIGHT
    MOV DX,OFFSET OUT_RIGHT
    MOV AH,09H
    INT 21H
ENND:
    MOV AH,4CH
    INT 21H
    
WRONG: 
    ;;;OUTPUT 'WRONG'
    MOV DX,OFFSET OUT_WRONG
    MOV AH,09H
    INT 21H
    JMP AGAIN
    
CODES ENDS
    END START