实验3分支程序实验

1、南昌大学实验报告学生姓名：学号：专业班级：实验类型： 验证 综合 设计 口创新实验日期：实验成绩：实验3分支程序实验.实验目的1. 掌握单分支、双分支、多分支程序的设计方法；2. 掌握利用DEBUGS CODEVIEW修改参数、检查结果的方法；1. 熟悉汇编语言源程序的编辑、汇编、连接及调试过程。.实验内容1.猜数程序，预设一数字字符 M,从键盘输入一个数字字符N,判断：若N <M,显示“TOOBIG” ;若 N >M 则显示“ TOO SMALL ;否则显示“ YOUR ARE RIGHT data segme ntM db '6'N db ?mesgl db O

2、dh,Oah, ' too small$ 'mesg2 db 0dh,0ah, ' too big$ 'mesg3 db 0dh,0ah, ' you are right$ 'data endscode segme ntassume ds:data,cs:codesta比mov ax,datamov ds,axmov ah,01hint 21hmov N,alcmp al,1bh;如果输入是 esc键就退出jmp exitcmp al,Mjb small; 比M小就跳去smallja big; 比M大就跳去bigmov dx,offset mes

3、g3;显示正确mov ah,09hint 21hjmp startsmall:mov dx,offset mesgl;显示太小字符串mov ah,09hint 21hjmp startbig:mov dx,offset mesg2;显示太大字符串mov ah,09hint 21hjmp startexit:mov ah,4chint 21hcode endsend start输入3显示too small ，输入9显示too big2. 编写一个程序，判别键盘上输入的字符；若是1-9字符，则显示“IT IS A DIGITAL” ;若为A-Z或a-z字符，均显示“ IT IS A LOWCASE

4、ETTER ;若是回车字符 <CR>其 ASCII码为ODH），则结束程序，若为其它字符则不显示，继续等待新的字符输入。data segme ntNdb ?mesgl db 0dh,0ah,'it is a digital$'mesg2 db 0dh,0ah,'it is a lowcase letter$'data endscode segme ntassume ds:data,cs:codesta比mov ax,datamov ds,axmov ah,01hi nt 21hmov N,alcmp al,0dh;如果输入为回车则退出j e exit

5、cmp al,31hj b start; 比1小就重新再来cmp al,39hj a let;比9大就跟字母比较mov dx,offset mesgl; 输出是数字mov ah,09hi nt 21hj mp startlet:cmp al,'A'j b start; 比A小就重新再来cmp al,'Z'j b display; 比Z大就输出cmp al,'a'j b start; 比a小就重新再来cmp al,'z'j a start; 比z大就重新再来 display:mov dx,offset mesg2; 输出是字母mov

6、 ah,09hi nt 21hj mp startexit:mov ah,4chi nt 21hcode endsend startc：>debug QZ ,exe Pgp|lt is 趙 di乌itnl.-gdit is a loMcase let3. 预留字符串口令，输入口令串与预留密码串比较。若匹配则显示“MATCH,否则显示“ NOMATCH!,PROGRAM TERMINATED!data segme ntmesg1 db 0dh,0ah,'match$'mesg2 db 0dh,0ah,'nomatch!,program terminated!$

7、9;mesg3 db 'hello$'data endscode segme ntassume ds:data,cs:codesta比mov ax,datamov ds,axmov bx,0mov cl,0mov ch,0;cl 和ch都清零in put:mov ah,01hint 21h; 输入字符inc cl;计算输入字符数cmp al,Odhje guide;输入是回车就跳进判断语句cmp cl,1;cl 是1的时候，bx是0je compareinc bxcompare:cmp al,mesg3bxje in put;如果输入相等则继续比较inc ch;存放输入不同的字

8、符个数jmp in putguide:cmp cl,01h;什么也没输入就退出je exitcmp cl,6;输入字符数与预设不同则不符合jne nocmp ch,0;输入字符数不同的个数为0则符合jne nomov dx,offset mesg1mov ah,09hint 21hjmp startno:lea dx,mesg2mov ah,09hint 21hjmp startexit:mov ah,4chint 21hcode endsend starttie) Lorwit匚 harixri输入hello 显示 match，输入a Ma M显示no match4.上述程序1、2、3分别完

9、成后请编写一个程序来实现简单的程序菜单显示。（采用 地址跳跃表法实现）显示一个菜单要求用户从下表中选择：(1)GUESS NUMBER GAME（对应程序1）(2)CHAR SELECTION PROGRAM（对应程序2）(3)PASSWORD PROGRAM（对应程序3）(4)PRESS “ ESC TO QUIT用户作出选择13时，显示输出要执行操作的名字，如“"Your selection is 1,the program will execute GUESS NUMBER GAME! ”然后转向相应的程序去执行，执行 结束前进行退出的判断，显示一个提示信息"will

10、 you con ti nue program really ？(Y:N) ”要求用户从键盘键入字符，若是“Y”键，则继续程序的执行，若是“ N”键,则返回到菜单。若用户选择4，要求程序显示提示信息“Please press ESC key toexit! ” ,并能按要求正确退出。data segme ntadr dw adr1; 定义地址表dw adr2dw adr3dw adr4menu db 0dh,0ah,'me nu:'定义目录db 0dh,0ah,'(1)guess nu mber game'db 0dh,0ah,'(2)char sele

11、ct ion program'db 0dh,0ah,'(3)password program'db 0dh,0ah,'(4)press "esc" to quit$'ase1 db 0dh,0ah,'your select ion is 1,the program will execute guess nu mber game!$',0dh,0ahase2 db 0dh,0ah,'your select ion is 2,the program will execute char selecti ong pro

12、gram!$',0dh,0ahase3 db 0dh,0ah,'your select ion is 3,the program will execute passwordprogram!$',0dh,0ahstr1 db 0dh,0ah,'will you continue program really?(Y:N)$'str2 db 0dh,0ah,'please press esc key to exit!$'str3 db 0dh,0ah,'please in put number between 1 to 9$'g

13、uess1 db 0dh,0ah,'too big$'guess2 db 0dh,0ah,'too small$'guess3 db 0dh,0ah,'you are right$'M db '6'N db ?charl db 0dh,0ah,'it is a digital$'char2 db 0dh,0ah,'it is a lowcase letter$'codel db 0dh,0ah,'match$'code2 db 0dh,0ah,' no match!progr

14、am term in ated!$'code3 db 'hello$'data endscode segme ntassume ds:data,cs:codestart:mov ax,datamov ds,axmov si,0mov bx,0lea si,adr; 把地址表首地址给 si mov dx,offset menu; 显示主菜单 mov ah,09hint 21hmov dl,0dh;换行mov ah,2int 21hmov dl,0ah;回车mov ah,2int 21hmov ah,1;输入选项int 21hcmp al,0dh;输入是回车就退出je L1

15、mov ah,0;ah 置零sub al,31hshl ax,1add si,axjmp adrsi;地址跳跃表法adrl:lea dx,ase1mov ah,9int 21h ; 提示选中1语句lea dx,str3mov ah,9int 21hmov dl,0dhmov ah,2int 21hmov dl,0ahmov ah,2int 21h ; 回车换行mov ah,01hint 21hmov N,alcmp al,Mjb small ; 比M小就跳去smallja big; 比M大就跳去bigmov dx,offset guess3 ;显示正确mov ah,09hint 21he1:

16、lea dx,str1 ;判断是否回主菜单mov ah,9int 21hmov ah,1int 21hcmp al,'Y'je adrljmp startsmall:显示太小字符串显示太大字符串mov dx,offset guess2 ;mov ah,09hint 21hjmp e1big:mov dx,offset guess1 ;mov ah,09hint 21hjmp e1L1:jmp adr4 ; 跳跃jump接力adr2:lea dx,ase2;提示选中2语句mov ah,9int 21hmov dl,0dhmov ah,2int 21hmov dl,0ahmov a

17、h,2int 21h ;回车换行mov ah,01hint 21hmov N,alcmp al,31hjb adr2;比1小就重新再来cmp al,39hja let; 比9大就跟字母比较mov dx,offset charl;输出是数字mov ah,09hint 21he2: lea dx,str1 ;判断是否回主菜单mov ah,9int 21hmov ah,1int 21hcmp al,'Y'je adr2jmp startlet:cmp al,'A'jb adr2;比A小就重新再来cmp al,'Z'jb display; 比Z大就输出c

18、mp al,'a'jb adr2;比a小就重新再来cmp al,'z'ja adr2;比z大就重新再来display:mov dx,offset char2mov ah,09hint 21hjmp e2adr3:lea dx,ase3;提示选中3语句mov ah,9int 21hmov dl,0dhmov ah,2int 21hmov dl,0ahmov ah,2int 21h;回车换行mov bx,0mov cl,0mov ch,0;cl 和ch都清零in put:mov ah,01hint 21h;输入字符inc cl;计算输入字符数cmp al,0dhje

19、 guide;输入是回车就跳进判断语句cmp cl,1;cl 是1的时候，bx是0 je compareinc bxcompare:cmp al,code3bxje in put;如果输入相等则继续比较inc ch;存放输入不同的字符个数jmp in putguide:cmp cl,6;输入字符数与预设不同则不符合jne nocmp ch,0;输入字符数不同的个数为0则符合jne nomov dx,offset codelmov ah,09hint 21hlea dx,str1;判断是否回主菜单mov ah,9int 21hmov ah,1int 21hcmp al,'Y'je

20、 adr3jmp startno:lea dx,code2mov ah,09hint 21hlea dx,str1;判断是否回主菜单mov ah,9int 21hmov ah,1int 21hcmp al,'Y'je adr3jmp startadr4:lea dx,str2; 提示选中4语句mov ah,9int 21hmov ah,1int 21hcmp al,1bhjne adr4;判断输入是否是 ESC键mov ah,4chint 21h ;退出code endsend startC：>debug 04.exe_SImenu：CDguess number game

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