土地资源调查与评价.doc

土地资源调查与评价.doc

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时间:2020-03-16

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1、......BeginningVisualBasic1.IntroducingVisualBasicAStoryAboutBillandPaulBackintheearly1970’s,BillandPaulwerefriendsatLakesideSchoolinSeattle,Washington.BillandPaulenjoyedworkingwithcomputersandwrotemanygamestheycouldplay-gameslikeTic-Tac-Toeandmoonlandingg

2、ames.ThesecomputergameswerewritteninacomputerlanguagecalledBASIC(whichstandsforBeginner’sAll-PurposeSymbolicInstructionCode).Whenthefirstsmallcomputerwasdevelopedinthemid1970’s,BillandPaulhadjuststartedcollege.Theyhadimprovedtheircomputerskillsbythenandwer

3、eabletotellthatnewcomputerhowtousetheBASIClanguage.TheyactuallysoldtheirversionoftheBASIClanguagetootherpeople(itcost$350andwasstoredonacassettetape).TheystartedmakingmoneysellingBASICanddecidedtostartacompany.Youmayhaveheardoftheircompany-Microsoft!Billis

4、BillGates,whostillrunsMicrosoftandisworthmanybillionsofdollars,andPaulisPaulAllen,whonolongerworksforMicrosoft,buthashisownbusinessventuresincludingcomputersandsoftware,professionalsportsteams,andrealestatedevelopment..专业资料.......Yes,thefirstproductsoldbyM

5、icrosoftwastheBASICcomputerlanguage.Microsoft’snamefortheirBASIClanguageproducthaschangedovertheyears,havingnameslikeGW-BASIC,QuickBasicandQBasic,withthenewestversionbeingcalledVisualBasic.VisualBasicisoneoftheeasiestprogramminglanguagestolearn.Yet,eventho

6、ughitiseasytolearnandtouse,VisualBasiccanalsobeusedtodevelopverypowerfulcomputerprograms.ManycomputergamesarewritteninVisualBasic,businessesuseVisualBasictomanagetheirdatabases,webmastersuseVisualBasicindevelopingwebpages,andpeoplelikeyourselfuseVisualBasi

7、ctobuildWindowsapplicationstheywantandneedintheireverydaylife.Inthesenotes,youwilllearnhowtouseMicrosoft’sVisualBasictowriteyourowncomputerprograms.YoumaynotbecomeabillionairelikeBillandPaul,buthopefullyyou’llhavesomefunlearningaveryvaluableskill..专业资料....

8、...Let’sGetStartedLearninghowtouseVisualBasictowriteacomputerprogram(likelearninganythingnew)involvesmanysteps,manynewterms,andmanynewskills.Wewilltakeitslow,describingeachstep,term,andskillindetail.Beforesta

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