汇编和高级语言(专业英语西南交大版).ppt

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1、Assembly&High-levelLanguages组号：2组姓名：****学号：********专业：软件工程专业英语2015.10.19content01Aboutassemblylanguages02Abouthigh-levellanguagesPARTONEAboutassemblylanguagesAboutassemblylanguagesWhatisassemblylanguages?Itisjustonelanguageamongmanyprograminglanguages.Itdevelopsa

2、sthemnemonicoperationcodes&symbolicaddressesarise.Itcanbetranslatedintomachine-languageusedwithincomputerswhileprocessingdatas.014Computeritselfbegintoassign&keeptrackofinstructionaddressesinsteadofhumanprogrammersProgrammerassignasymbolicname&anactualaddresstoad

3、ataitemPeoplemerelyspecifythefirstinstruction’slocation,assemblerwillautomaticallyallocateslocationsforinstructions&dataThedevelopmentofassemblylanguages01Theyallowprogrammerstosubstitutelettersymbolsfornumericmachine’soperationcodes123mnemonicoperationcodesarise

4、SymbolicaddressingdevelopsSavetime,reducedetail.Fewererrorswhichcanbemoreeasiertofind.Moreeasierforpeopletomodify.Someadvantagesandlimitationsofassemblylanguages01TheyarealwaystimeconsumingadvantageslimitationsTheyaremachine-orientedSometimesprogramshavetoberecod

5、edforanotherdifferentmachinebyusingit.PARTTWOAbouthigh-levellanguagesWhydidtheybeenproduced?ThereasonisthatpeoplewanttospeedupcodingWhatarethey?TheyarejustonekindofprograminglanguagesWhatelsedohelpitsdevelopment?Abouthigh-levellanguages02thedevelopmentofmnemonict

6、echniques¯oinstructionsledAdvantagesofhigh-levellanguages02They’reeasiertolearnthanassemblylanguagesTheyrequireslesstimetpwrite.Theyprovidebetterdocumentation..Theyareeasiertomaintain.Theyarenotrestrictedtousingasingletypeofmachine.THANKS