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1、职场大变样社区(www.zcdby.com):下载毕业设计成品全套资料，全部50元以下年级：姓名：学号：专业：指导教师：年月日13.3INSTRUCTIONSTheobject-orientednotationdevelopedinthisbookisimperative:wespecifycomputationsthroughcommands,alsocalledinstructionso(Theword“statement”iscommonlyusedinthissensebutwewillsteadfastl

2、yavoiditsinceitismisleading:astatementisanexpressionoffacts，notacommand。)Exceptforsomespecificpropertiesofloops,intendedtomaketheirverificationeasier，instructionswilllookfamiliartoanyonewhohashadsomeexperiencewithamodernlanguageoftheAlgollinesuchasPascal，Adaor

3、Modula，orevenjustwithCoraderivative。Theyinclude:Procedurecall;Assignment;Creation;Conditional;Multi_branch;Loop;Check;Debug;Retry;Assignmentattempt。ProcedurecallAroutinecallinvolvesaroutine，possiblywithactualarguments。Inacallinstruction，theroutinemustbeaproced

4、ure;ifitisafunction，thecallisanexpression。Althoughforthemomentweareinterestedininstructions，thefollowingrulesapplytobothcasesoAcalliseitherqualifiedorunqualified。Anunqualifiedcalltoaroutineoftheenclosingclassusesthecurrentinstanceastarget;itappearsundertheform

5、r(withoutarguments),orr(x，y，".)(witharguments)Aqualifiedcallexplicitlynamesitstarget，denotedbyanexpression:ifaisanexpressionofacertaintype,Cisthebaseclassofthattype，andqisoneoftheroutinesofC，thenaqualifiedcallisoftheformaqqoAgain，qmaybefollowedbyalistofactuala

6、rguments;amaybeanunqualifiedfunctioncallwitharguments,asinp(m)qq(n)wherethetargetisp(m)oYoumayalsouseastargetamorecomplexexpression,providedyouencloseitinparentheses，asin(vector1+vector2)*countoMultidotqualifiedcalls,oftheforma*ql*q2...qnarealsopermitted，where

7、aaswellasanyoftheqimayincludealistofactualargumentsoExportcontrolsapplytoqualifiedcalls。RecallthatafeaturefdeclaredinaclassBisavailabletoaclassAifthefeatureclausedeclaringfbeginswithfeature(withoutfurtherqualification)orfeature{X，Y，"•}whereoneofX，Y，•"isAoranan

8、cestorofAoThen:QualifiedCallruleAqualifiedcalloftheform/，.q卜appearinginaclassCisvalidonlyifitsatisfiesthefollowingconditions:R1•Thefeatureappearingafterthefirstdot，q卜mustbeavailabl