汇编综合应用(1) Test Palindrome

王朝other·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

在粗略的看过string instruction之后, 综合了先前所有看过的,写了个测试palindrome的程序,再次让大脑到达兴奋点

,现在终于可以让大脑轻松一下了。呵呵~~~ 源码如下:

.model small

.stack 300h

.data

str1 byte 255 dup(?)

str2 byte 255 dup(?)

s1 byte "Please input a string:"

s2 byte "Palindrome matched "

s3 byte "Palindrome unmatched"

count word ?

len word ?

flag byte ?

.code

.startup

mov ax,@data

mov ds,ax

mov es,ax

mov flag,0

Main Proc

lea bx,s1

mov cx,lengthof s1

add cx,bx

mov ah,2

Call printOut

mov si,offset str1

mov ah,8

Call getStr1

Call CopyToStr2

Call Reverse

Call Check

mov ah,2

Call PrintNL

cmp flag,1

je Matched

lea bx,s3

mov cx,lengthof s3

add cx,bx

mov ah,2

Call printOut

.exit

Matched:lea bx,s2

mov cx,lengthof s2

add cx,bx

mov ah,2

Call printOut

.exit

Main EndP

printOut Proc

loop4:cmp bx,cx

je finish4

mov dl,byte ptr[bx]

int 21h

inc bx

jmp loop4

finish4:ret

printOut EndP

getStr1 Proc

loop1:mov ah,8

int 21h

cmp al,13

je finish1

mov [si],al

mov ah,2

mov dl,[si]

int 21h

inc si

inc len

jmp loop1

finish1:mov [si],0

ret

getStr1 EndP

printNL Proc

mov dl,10

int 21h

mov dl,13

int 21h

ret

printNL EndP

CopyToStr2 Proc

cld

mov cx,0

mov cx,len

mov si,offset str1

mov di,offset str2

rep movsb

ret

CopyToStr2 EndP

Reverse Proc

mov si,offset str1

mov di,offset str2

mov ax,0

mov ax,len

mov dx,0

loop5:push ds:[si]

inc count

inc si

cmp count,ax

jl loop5

loop6:pop es:[di]

dec count

inc di

cmp count,0

jg loop6

ret

Reverse EndP

Check Proc

mov cx,len

mov si,offset str1

mov di,offset str2

rep cmpsb

je setFlag1

jne setFlag2

setFlag1:mov flag,1

ret

setFlag2:mov flag,0

ret

Check EndP

end

 
 
 
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