匯編程序:比較2個字符串是否相同(初級版)

DATAS SEGMENT
   source1 db 50 dup(?) ; 存放第一個串
   source2 db 50 dup(?) ; 存放第二個串
   title1 db 'Please input the first string:',0dh,0ah,'$'
   title2 db 'Please input the second string:',0dh,0ah,'$'
   ans db 'match',0dh,0ah,'$'
   ans1 db 'no match',0dh,0ah,'$' 
 DATAS ENDS
STACKS SEGMENT
  
STACKS ENDS
CODES SEGMENT
    ASSUME CS:CODES,DS:DATAS,SS:STACKS
START:
    MOV AX,DATAS
    MOV DS,AX
    mov dx,offset title1;輸出抬頭
    mov ah,09h  ;輸出字符串用09
    int 21h
    mov cl,50
    mov si,0
 again:
    mov ah,01h
    int 21h
    cmp al,0dh
    jz two
    mov source1[si],al
    inc si
    dec cl
    jnz again  ;將第一個串搞定
two:
    mov dx,offset title2;輸出第二個抬頭
    mov ah,09h
    int 21h
    mov cl,50
    mov si,0
again1:
     mov ah,01h
     int 21h
     cmp al,0dh
     jz main
     mov source2[si],al
     inc si
     dec cl
    jnz again1;這里以上部分是給兩個字符串賦值，一下部分是比較。
main:
    mov si,0
    mov cx,6
again2:mov al,source2[si]
      cmp  source1[si],al
      jnz nomatch
      inc si
      dec cx   
      jnz  again2
      cmp cx,0
      jz match  
nomatch:mov dx,offset ans1
        mov ah,09h
        int 21h
       jmp over
match: mov dx,offset ans
       mov ah,09h
       int 21h
over:  MOV AH,4CH
       INT 21H
CODES ENDS
    END START
; MADE BY WQ
 
這里是完善版的程序:http://www.torrancerestoration.com/mcu/2469.html