哈工程微机原理实验4

实验五字符串匹配程序实验目的掌握显示提示信息的方法及接收键盘输入信息的方法。二、实验内容编写程序，实现两个字符串比较。如相同，则显示”MATCH”,否则，显示“NOMATCH”。入口三、程序框图入口返回DOS显示“NOMATCH”显示“MATCH”串1中的字符已取完？SI加1，指向串1中下一字符相等？SI指向的字符和串2中所有字符作比较使用INT21H的0AH号子功能，接收键入的字符串指针返回DOS显示“NOMATCH”显示“MATCH”串1中的字符已取完？SI加1，指向串1中下一字符相等？SI指向的字符和串2中所有字符作比较使用INT21H的0AH号子功能，接收键入的字符串指针SI指向串1的首字符显示“请输入字符串2”显示“请输入字符串1”段寄存器及堆栈初始化Y N N Y 四、实验程序及实验现象crlf macro movdl,0dh movah,02h int21h movah,02h movdl,0ah int21hendmdata segmentmess1db 'match',0dh,0ah,'$'mess2db 'nomatch',0dh,0ah,'$'mess3db 'inputstring1:',0dh,0ah,'$'mess4db 'inputstring2:',0dh,0ah,'$'maxlen1db 81actlen1db?string1db81dup(?)maxlen2db 81actlen2db?string2db81dup(?)data endsstack segmentsta db 50dup(?)top equ lengthstastack endscode segmentassume cs:code,ds:data,es:data,ss:stackstart: mov ax,data mov ds,ax mov es,axmovax,stackmovss,axmovsp,top mov ah,09h mov dx,offsetmess3 int 21hmov ah,0ah mov dx,offsetmaxlen1 int 21hcrlfmov ah,09h mov dx,offsetmess4 int 21hmov ah,0ah mov dx,offsetmaxlen2 int 21hcrlfcldmovsi,offsetstring1movcl,[si-1]movch,00hkkk:movdi,offsetstring2pushcxmovcl,[di-1]movch,00hmoval,[si]movdx,direpnzscasbjzgggincsipopcxloopkkkmov ah,09h mov dx,offsetmess2 int 21hjmppppggg:mov ah,09h mov dx,offsetmess1 int 21hppp:movax,4c00hint21hcodeendsendstart输入字符串1和字符串2，比较，若有相同字符则显示“match”，没有则显示“nomatch”（下图有和没有两种情况）五、修改后的程序及实验现象crlf macro movdl,0dh movah,02h int21h movah,02h movdl,0ah int21hendmdata segmentdata1db5dup(?)mess1db 'match',0dh,0ah,'$'mess2db 'nomatch',0dh,0ah,'$'mess3db 'inputstring1:',0dh,0ah,'$'mess4db 'inputstring2:',0dh,0ah,'$'maxlen1db 81actlen1db?string1db81dup(?)maxlen2db 81actlen2db?string2db81dup(?)data endsstack segmentsta db 50dup(?)top equ lengthstastack endscode segmentassume cs:code,ds:data,es:data,ss:stackstart: mov ax,data mov ds,ax mov es,axmovax,stackmovss,axmovsp,top mov ah,09h mov dx,offsetmess3 int 21hmov ah,0ah mov dx,offsetmaxlen1 int 21hcrlfmov ah,09h mov dx,offsetmess4 int 21hmov ah,0ah mov dx,offsetmaxlen2 int 21hcrlfcldmovsi,offsetstring1movcl,[si-1]movch,00hmovbh,0kkk:movdi,offsetstring2pushcxmovbl,30hmovcl,[di-1]movch,00hmoval,[si]movdx,dilp1:scasbjzfounddeccxjnzlp1testbl,0fhjnzggglp2:incsipopcxloopkkktestbh,4fhjnzpppmov ah,09h mov dx,offsetmess2 int 21hjmppppfound:addbl,01addbh,01deccxjnzlp1ggg:mov ah,09h mov dx,offsetmess1 int 21hmovdl,[si]movah,02hint21hcrlfmovdl,blint21hcrlfjmplp2ppp:movax,4c00hint21hcodeendsendstart输入字符串1和字符串2，比较，若有相同字符则显示“match”，没有则显示“no