汇编语言实验报告源代码

分支程序设计-字母字符转换-源码：.386.MODELFLATExitProcessPROTONEAR32stdcall,dwExitCode:DWORDINCLUDEio.h;headerfileforinput/outputcrEQU0dh;carriagereturncharacterLfEQU0ah;linefeed.STACK4096;reserve4096-bytestack.DATApromotBYTE"Enteracharofletter",cr,Lf,0warningBYTE"Thecharisn'taletter,enteragain",0answerLtoUBYTE"Thecharisalowercase,it'suppercaseis"BYTEcr,Lf,0answerUtoLBYTE"Thecharisauppercase,it'slowercaseis"BYTEcr,Lf,0charBYTE1DUP(?).CODE_start:outputpromot ;输出提示语句inputchar,1 ;输入数据doGo:movbl,charinputchar,1cmpchar,0dh ;与0dh比较jedoWhCMP ;若相等，跳转到doWhCMPjmpdoGo ;重新输入数据doWhCMP:cmpbl,41h ;与41h(A)比较jlinputAgain ;若char<A，提示重新输入cmpbl,5AhjleendUppertoL ;若char<=Z，跳转到大写字母转换为小写字母部分cmpLower:cmpbl,61h ;与61h(a)比较jlinputAgain ;若char<a，跳转到重新输入cmpbl,7Ah ;与7Ah(z)比较jginputAgain ;若char>z，跳转到重新输入jmpendLowertoU ;跳转到小写字母转换为大写字母部分inputAgain:outputwarning ;输出错误信息提示语句inputchar,1 ;输入数据movbl,charjmpdoGo ;跳转到比较部分endUppertoL:moval,bladdal,32 ;ASCII码加32movchar,aloutputanswerUtoL ;输出结果提示语句outputchar ;输出结果jmpendMain ;跳转到结束部分endLowertoU:moval,blsubal,32 ;ASCII码减32movchar,aloutputanswerLtoU ;输出结果提示语句outputchar ;输出结果endMain:INVOKEExitProcess,0;exitwithreturncode0PUBLIC_start;makeentrypointpublicEND;endofsourcecode

循环程序设计-显示九九乘法表-源码：.386.MODELFLATExitProcessPROTONEAR32stdcall,dwExitCode:DWORDINCLUDEio.hcrEQU0dhLfEQU0ah.STACK4096.DATAcomeBYTE"Welcometomultiplicationtable!",cr,Lf,0sumBYTE6DUP(?),0firstBYTE6DUP(?),0secondBYTE6DUP(?),0rowWORD?lieWORD?prompt1BYTE"*",0prompt2BYTE"=",0prompt3BYTEcr,Lf,0prompt4BYTE"",0.CODE_start:outputcome ;输出欢迎语句outputprompt3 ;换行movrow,1 ;将行数初始值赋值为1movlie,1 ;将列数初始值赋值为1fo:cmprow,9 ;行数与9相比较jgquit ;若行数等于9则退出循环movbx,row ;bx寄存器中存储行数itoafirst,bx ;将bx的值转换为ASCII码值存储到first中outputfirst+5 ;输出行数outputprompt1 ;输出乘号movcx,lie ;cx寄存器中存储列数itoasecond,cx ;将cx的值转换为ASCII码值存储到second中outputsecond+5 ;输出列数outputprompt2 ;输出等号movax,cx ;将cx寄存器中的列数移到ax寄存器为乘法做准备imulbx ;做乘法bx*ax即行数*列数itoasum,ax ;将结果转换为ASCII码值存储到sum中outputsum+4 ;输出乘积运算结果outputprompt4 ;输出空格cmpbx,cx ;行数与列数值进行比较jeto ;若相等则跳转到换行输出部分inclie ;列数自增jmpfo ;继续循环to:outputprompt3 ;输出换行incrow ;行数自增movlie,1 ;列数初始化为1jmpfo ;进入循环quit:INVOKEExitProcess,0;exitwithreturncode0PUBLIC_start;makeentrypointpublicEND;endofsourcecode

子程序设计-求给定整数的所有素因子-源码：.386.MODELFLATExitProcessPROTONEAR32stdcall,dwExitCode:DWORDINCLUDEio.h;headerfileforinput/outputcrEQU0dh;carriagereturncharacterLfEQU0ah;linefeed.STACK4096;reserve4096-bytestack.DATA;reservestoragefordataflaiDWORD?tempDWORD?crlfBYTE"*",0eqllBYTE"=",0promptBYTE"Enteranumbertofindalltheprimefactors",cr,Lf,0flDWORD?valueBYTE11DUP(?),0charBYTE1DUP(?)PUBLIC_start.CODE;startofmainprogramcode_start:outputprompt ;输出提示语句inputvalue,11 ;输入数据atodvalue ;ASCII码转换为数字pusheax ;eax寄存器的值压入堆栈callbyteInput ;调用byteInput子程序addesp,4outputeqll ;输出等号pusheax ;eax寄存器的值压入堆栈callfindPfactor ;调用findPfactor子程序addesp,4INVOKEExitProcess,0;exitwithreturncode0findPfactorPROCNEAR32 ;寻找素因子子程序pushebp ;ebp内的值压入堆栈movebp,espmoveax,[ebp+8]movflai,eaxmovecx,2movebx,ecxdoFind:movecx,ebxcmpecx,flai ;while循环的条件比较jeendFind ;如果ecx的值与flai相等则退出循环doFactor:movtemp,eaxcdq ;为除法做准备idivecx ;除法eax=eax/ecxcmpedx,0 ;eax符号位与0进行比较jneendFactor ;若不相等跳转到endFactor部分pushecx ;ecx值压入堆栈outputcrlf ;输出换行callbyteInput ;调用byteInput子程序addesp,4jmpdoFactorendFactor:moveax,tempincebx ;ebx值自增jmpdoFind ;跳转到doFind部分endFind:popebp ;ebp弹出堆栈ret ;返回指令findPfactorENDP ;findPfactor子程序结束byteInputPROCNEAR32 ;byteInput子程序pushebp ;ebp压入堆栈movebp,esppushebx ;ebx压入堆栈pusheax ;eax压入堆栈pushedx ;edx压入堆栈movfl,0movebx,10moveax,[ebp+8]doWh:cdq ;为除法做准备idivebx ;除法eax=eax/ebxpushedx ;edx压入堆栈incfl ;fl值自增cmpeax,0 ;eax与0比较jeenddoWh ;若相等则退出循环jmpdoWhenddoWh:doPrint:cmpfl,0 ;fl值与0作比较jeenddoPrint ;若相等则退出输出循环decfl ;fl值自减popedx ;edx弹出堆栈movchar,dladdchar,'0'outputchar ;输出charjmpdoPrint ;继续循环enddoPrint:popedx ;edx弹出堆栈popeax ;eax弹出堆栈popebx ;ebx弹出堆栈popebp ;ebp弹出堆栈ret ;返回指令byteInputENDP ;byteInput子程序结束END;endofsourcecode

位运算指令的使用-双字型数的高低字转换-源码：.386.MODELFLATExitProcessPROTONEAR32stdcall,dwExitCode:DWORDINCLUDEio.h;headerfileforinput/outputcrEQU0dh;carriagereturncharacterLfEQU0ah;linefeed.STACK4096;reserve4096-bytestack.DATA;reservestoragefordatapromptBYTE"Inputanumber:",0numberBYTE20dup(?)resultBYTEcr,Lf,"The2'scomplementrepresentationis:"hexoutBYTE8DUP(?),cr,Lf,0prompt2BYTEcr,lf,"Aftertheshift",0.CODE ;startofmainprogramcodeHexPROCNEAR32pusheaxleaebx,hexout+7 ;取最后一个字符的地址mov