微机原理分支程序设计实验

1、2.3分支程序设计实验实验目的1、掌握分支程序的设计方法。2、掌握宏定义及宏调用的基本方法。ASCII码表示方法。3、了解小写和大写字母的 ASCII码表示及其转换方法。了解数字及其它字符在的4、进一步掌握调试工具的使用方法实验预习要求1、复习比较指令、条件转移指令的用法。2、复习宏定义及宏调用的基本方法。3、根据实验内容”中给出的流程图和程序框架编写源程序，以便上机调试。4、程序框架中显示提示信息的指令序列用宏调用实现。5、从实验习题”中任选一道题目，编写源程序，以便上机调试。实验内容从键盘输入一字符，判断该字符是小写字母、大写字母、数字或其它字符。若输入为小写字母，显示 You In pu

2、t a Lowercase Letter ! ”；若输入为大写字母，显示"You In put a Uppercase Letter ! ”；若输 入为数字，显示"You In put a Digit ! ”；若输入为其它字符，显示"You In put Other Letter ! ”。1、编程指导数字0 9的ASCII码为30H 39H ；大写字母的 ASCII码为41H 5AH，小写字母的 ASCII码为 61H 7AH。本题目将字符分为小写字母、大写字母、数字及其它字符，根据键入字符的ASCII码值判断其所属类型，并显示相应的信息。字符串显示使用功能号为0

3、9H的DOS功能调用，接收键盘输入的单个字符使用功能号为 01H的DOS功能调用。2、流程图及程序框图（1）流程图(2)实验代码:DATA SEGMENTINF0R1 DB OAH,ODH,"Please Press Any Key to in put a letter:$"INF0R2 DB 0AH,0DH,"You In put a Lowercase Letter! $"INFOR3 DB 0AH,0DH,"You In put a Uppercase Letter! $"INFOR4 DB 0AH,0DH,"You

4、In put a Digit!$"INFOR5 DB 0AH,0DH,"You In put Other Letter!$"DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATASTART: MOV AX,DATAMOV DS,AXMOV DX,OFFSET INFOR1MOV AH,09HINT 21HCMP AL,'0' JB OTHERCMP AL,'9' JBE DIGITCMP AL,'A' JB OTHER CMP AL,'Z'JBE UPPER CMP A

5、L,'a' JB OTHER CMP AL,'z'JBE LOWER JMP PENDLOWER:MOV DX,OFFSET INFOR2MOV AH,09HINT 21HJMP PENDUPPER:MOV DX,OFFSET INFOR3MOV AH,09HINT 21HJMP PENDDIGIT:MOV DX,OFFSET INFOR4MOV AH,09HINT 21HJMP PENDOTHER:MOV DX,OFFSET INFOR5MOV AH,09HINT 21HJMP PENDPEND:MOV AH,4CHINT 21HCODE ENDSEND ST

6、ART(3)实验结果：Please press any key to input a letter：7 you imput a.C ：OfenzliiPlease press any key to input a letter:A you input a. upease letter:C ：>fenzliiP lease press any kecj to inpui a letter:a you input a. lowercase letter：C：>fEnzh iPlease press ciny key to input a 1亡tter;tt you input othe

7、r leter:实验习题1、在屏幕上显示信息"Are you really want to exit? ”，然后从键盘输入一个字符，若输入"Y”或y”，显示 Thank you for your using !”后程序结束；若输入"N ”或n”，显示Let's continue! ”后程序结束；若输 入其它字符，显示"You press an error key!”后程序结束(要求尽量使用宏指令以便使源程序更加简 洁)。(1)实验代码：DATA SEGMENTINFOR1 DB 0AH,0DH,"Are you really want

8、to exit?$"INFOR2 DB 0AH,0DH,"Thank you for your using !$"INFOR3 DB 0AH,0DH,"Let's con tin ue !$"INFOR4 DB 0AH,0DH,"You press an error key !$"DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATASTART:MOV AX,DATAMOV DS,AXMOV DX,OFFSET INFOR1MOV AH,09HINT 21HMOV AH,01HINT

9、21HCMP AL,'Y'JE YESCMP AL,'y'JE YESCMP AL,'N'JE NOCMP AL,' n'JE NOJMP PENDYES:MOV DX,OFFSET INFOR2MOV AH,09HINT 21HJMP PENDNO:MOV DX,OFFSET INFOR3MOV AH,09HINT 21HJMP PENDOTHER:MOV DX,OFFSET INFOR4MOV AH,09HINT 21HJMP PENDPEND:MOV AH,4CHINT 21HCODE ENDSEND START(2)实验结

10、果：C :>nyexitAre you rea11y uant to ExitWyTlianJt gou for your using tC:>oyexitAre ijou rea 1 ly uKint tc exit?n Let1 s com-tinme !C ；>2、在屏幕上显示如下信息:1 Panda2 Cat3 Rabbit4 Pig5 EXIT （Please choose 1,2,3,4or 5）若输入1，显示“ like panda ”后程序结束；若输入2，显示“ like cat ”后程序结束；若输入3,显示“ like rabbit ”后程序结束；若输入4，

11、显示“ don 'like pig ”后程序结束；若输入5，程序直接结束；若输入其 它字符，显示"You press an error key! ”后程序结束（要求尽量使用宏指令以便使源程序更加简洁）。（1）代码：DATA SEGMENTINF0R1 DB 0AH,0DH,"1Pan da$"INF0R2 DB 0AH,0DH,"2Cat$"INF0R3 DB 0AH,0DH,"3Rabbit$"INF0R4 DB 0AH,0DH,"4Pig$"INF0R5 DB 0AH,0DH,"5E

12、XIT$"INF0R6 DB 0AH,0DH,"I like Pan da$"INF0R7 DB 0AH,0DH,"I like Cat$"INF0R8 DB 0AH,0DH,"I like Rabbit$"INF0R9 DB 0AH,0DH,"I don't like Pig$" DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATA START:MOV AX,DATAMOV DS,AXMOV DX,OFFSET INFOR1MOV AH,09HINT 21HMO

13、V DX,OFFSET INFOR2MOV AH,09HINT 21HMOV DX,OFFSET INFOR3MOV AH,09HINT 21HMOV DX,OFFSET INFOR4MOV AH,09HINT 21HMOV DX,OFFSET INFOR5MOV AH,09HINT 21HMOV AH,01HINT 21HCMP AL,'1'JE ACMP AL,'2'JE BCMP AL,3JE CCMP AL,'4'JE DCMP AL,'5'JE PEND;JMP PENDA:MOV DX,OFFSET INFOR6MOV

14、 AH,09HINT 21HJMP PENDB:MOV DX,OFFSET INFOR7MOV AH,09HINT 21HJMP PENDC:MOV DX,OFFSET INFOR8MOV AH,09HINT 21HJMP PENDD:MOV DX,OFFSET INFOR9MOV AH,09HINT 21HJMP PENDPEND:MOV AH,4CHINT 21HCODE ENDSEND START(2)实验结果：C :>caidan1Fcinria帛.Cat3RabbitkPig5EXIT1I likeC:S>caidanN2CatRabbitFigEXITZI like Catc：s>Rm it Pig EXIT3I liKe Rabbit C:Pnin就已 Cat Bab