汇编程序实验2.3代码

DATAS SEGMENT

STRING1 DB 'Input Your String: $';输入提示信息

STRING2 DB 'Digit: $' ;各类字符提示信息

STRING3 DB 'Alph: $'

STRING4 DB 'Others: $'

DIGIT DB 0 ;数字

ALPH DB 0 ;字母

OTHERS DB 0 ;其他

DATAS ENDS

CODES SEGMENT

ASSUME CS:CODES,DS:DATAS

START:

MOV AX,DATAS

MOV DS,AX

LEA DX,STRING1 ;显示输入提示信息

MOV AH,9

INT 21H

MOV CX,100 ;设置循环次数主够大

L1:MOV AH,1 ;中断调用，单字符输入

INT 21H

CMP AL,0DH ;若输入回车符则结束 

JZ OVER2

CMP AL,30H

JB OTHER ;若<30H(0)，OTHERS++

CMP AL,39H ;若>39H(9),跳转进一步比较

JA HIGHER1

JMP DIGITAL ;DIGIT++

HIGHER1:CMP AL,41H ;if<41H(A),OTHERS++

JB OTHER

CMP AL,5AH ;if>5AH(Z),跳转继续比较