information technology assignment 2 unit programming

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BTEC FPT INTERNATIONAL COLLEGE

INFORMATION TECHNOLOGY

ASSIGNMENT 2

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ASSIGNMENT 2 FRONT SHEET

Qualification BTEC Level 1 HND Diploma in Computing

Unit number and title Unit: Programming

Student declaration

I certify that the assignment submission is entirely my own work and I fully understand theconsequences of plagiarism. I understand that making a false declaration is a form of malpractice.

Student’s signature:Nguyen Trung Hoa

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Internal Verifier’s Comments:

Signature & Date:

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First of all, I would like to thank my mentor Nguyen Hoang Anh Vu for hisconstant support in my studies and research, for his patience, motivation,enthusiasm and rich knowledge. His guidance has helped me throughout the time ofstudying and writing this thesis. Without your wonderful help, I would not have beenable to achieve this.

In addition to my mentor, I would like to thank my friends who have helpedme improve my knowledge of my subject. Not only that, they are always there tosupport me when I need it. And besides, I would like to thank the school for creating allconditions for me to have adequate facilities to help me complete my work.

Last but not least, I would like to thank my family, who gave birth to me from thebeginning and supported me spiritually. They are always behind to care and help me havemore motivation to complete the work well!

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Iverifythat thework I'vesubmittedfor thisassignmentis allmy own,and thatallresearchsourceshavebeenproperlycredited.

I declare that this is my work, based on my research, and that I have recognized allmaterials and sources utilized in its production, including books, papers, reports, lecturenotes, and any other type of document, electronic or personal communication.

I further declare that I have not previously submitted this assignment for assessment inany other unit, except where explicit permission has been granted by all unit coordinatorsinvolved, or at any other time in this unit, and that I have not duplicated or stolen ideas from thework of others in any way.

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iv

TABLE OF CONTENT

event-2 Give explanations of what procedural, object-oriented and event-drivenparadigmsare;their characteristicsandthe relationshipbetweenthem.(P2)...2

2.1.4Therelationshipamong eventdrivenprogramming(EDP)andobject-orientedprogrammingsystem (OOPs)andprocedural-orientedprogramming (POP)...10

2.2Analyze thecommon featuresthata developer hasaccess toin anIDE(M2)...11

CHAPTER3:Implementbasicalgorithmsin codeusinganIDE...15

3.1. WriteaprogramthatimplementsanalgorithmusinganIDE. (P3)(LO3)anddeterminedebuggingprocessand explaintheimportanceofacodingstandard (LO4)...15

3.2UsetheIDEtomanage thedevelopmentprocessoftheprogram.(M3)...22

3.3Explainthedebuggingprocessandexplain thedebuggingfacilitiesavailableintheIDE. (P4)...28

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vi

LIST OF TABLES AND FIGURES

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viii

LIST OF ACRONYM

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Programmingplaysanextremelyimportantrolein life.Coming tothisreport,we willlearnaboutunderstandingprogrammingmodelssuchasproceduralprogramming, object-orientedprogramming,andevent-orientedprogramming.

Aswellasthe structure of aprogram,data,andbasicdata,while also introducingstudents to the use of an integrated development environment (IDE), its functions, andsome standard rules, such as naming in code. At the same time, it assists students inlearninghowto createsimpleapps.Let'sfindout inthisassignment!

CHAPTER 2: Explain the characteristics of procedural, object-oriented andevent-driven programming, conduct an analysis of a suitable Integrated DevelopmentEnvironment(LO2)(IDE)

2 Give explanations of what procedural, object-oriented and event-drivenparadigmsare;their characteristicsandthe relationshipbetweenthem.(P2)

2.2Analyze thecommon featuresthata developer hasaccess toin anIDE(M2).CHAPTER3:Implementbasicalgorithmsin codeusinganIDE

3.1. WriteaprogramthatimplementsanalgorithmusinganIDE. (P3)(LO3)anddeterminedebuggingprocessand explaintheimportanceofacodingstandard (LO4)

3.2UsetheIDEtomanage thedevelopmentprocessoftheprogram.(M3)3.3Explainthedebuggingprocessandexplain thedebuggingfacilitiesavailableintheIDE. (P4)

3.4Outlinethecodingstandardyouhaveusedinyourcode.(P5)

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CHAPTER 2: Explain the characteristics of procedural,object-orientedandevent-drivenprogramming,conductan analysisof asuitableIntegratedDevelopmentEnvironment(LO2)(IDE)

2 Give explanations of what procedural, object-oriented and drivenparadigmsare;theircharacteristicsandtherelationshipbetweenthem.(P2)

Programmingis ajobwhereprogrammersuse availableprogramminglanguages,codes,andutilities tobuildsoftware,programs,applications,games,websites,etc.Userscan perform commands with computers or interact with each other through electronicdevices.[1]

- Structure-orientedprogramming,alsoknownasprocedure-oriented programming (POP):is a traditional programming technique in which a program is divided into functions(subroutines).

- Eachprogram canalsobe dividedintomanyothersubroutinestosimplifytheirwork.(Smoothingprocess)

Figure2-1:Procedure-Oriented Programming

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-nowwewill startwithaddition,subtractionmultiplydivision,thensolvetheequationandfinallyfindmin, max

-wewillputthenumbers inforthemachinetodothecalculation:Example:

+puttwonumbersinaand btoperformaddition:

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-weuse theradiobuttontoswitchto max3tomaketheline Cappeartocalculatetheequation.

-put3 times theadvantage in a, b,c is 2,5, 1we willhavethefollowingresult:

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Figure3-5:Quadratic+nowwewillperformthe searchforthelargestnumber-wewillputin5numbersas2,5,3,7,4toseehow theresultis:

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-it'sgreatthatthefunctionsarerunningandtherearenoerrors,allasexpected,iftheuserenters thewrong data,the system willautomaticallynotifythe user,orswitchbacktotheerrorcode.

- Forexample, wesolvethe quadraticequationbutdo notusethe radiobuttoncommandtodisplaythe linetowriteallthenumberstoperformthecalculation,the systemwillreturnthefollowing:

- ErrorSystem.FormatException:'Inputstringwasnotina correctformat.'Whenwewritethewrong code,theprocessisinterruptedbecausethesystemdoesnotunderstandacertaincode,andreturnstheerrorcode.

-Above we cansee theimportanceof a coding standard.+ Theyareaveryimportantattributeofsoftwaredevelopment.

+A codingstandardensures thatall developerswho write code ina particularlanguagewrite according to specified guidelines. This makes the code easy to understand andprovidesconsistencyinthecode.

+ One of the most essential elements in a software system is the consistency of thecodingstandard.Thisisbecauseitpositivelyaffectsthequalityofthesystem.Whileusing

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thesoftwaresystem,youneedtoensurethattheprinciplesdonotconflictwitheachother.Thesource codethatuses thestandardmust also be inharmonywith thestandard.Thecompleted source code should appear as if the code had been written by a singledeveloperinasinglesession.

3.2Usethe IDEto manage thedevelopmentprocessof theprogram.(M3)

-BeforeusingtheIDEtomanagethedevelopmentprocessoftheprogram,weneedtoknowifitsupportsthelanguageyouareusing.IwilluseVisualStudiosoftwareandtheC#programminglanguage tomanagetheprogram'sdevelopment process.

-WhenstartingVisualStudio,itwill displayaninterface with 4 mainfunctions,inaddition,theleftpartistheprojectsthatwehaveworkedon,itwillbestoredanddisplayedontheleft.

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-Weclickthiscommand,itwill createanewprojectandI willcreatea projectwithC#languageandstartwithconsole

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-afterselectingthelanguageandoperatingsystem,thesystemforprogramming.Atablewiththeinformationwillbedisplayedformetonametheproject,wheretostoreit.-Whentheselection isdone,I will clickCreate to starttheproject,-AnIDEhasbeencreated.

Figure3-11:VisualStudio4

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-nowwewilluseC# languageandenableWinforminterfacetodothisproject

Figure3-12:VisualStudio5

+Iwillstartwith abasic mathproblem:

+Thefirstis toaddfeaturestothewinforminterfacesothat wecancodetheprogram,withthe projecttocalculate theperimeterandareaofthe rectangle,Iusedthewinforminterfacetobuildthefollowing:

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+whenI havesuccessfullybuilt theinterfaceframework,IcontinuetouseC# languagetocodeit:

-Now Iwill testtheprogram

+westart byenteringtwo numbersincellAandB respectively5 and3, thesystemwillcalculateforusandoutputtheresultto thescreen.

+Error!!!this isabasicerrorinwinform which is“wrongobjectnaming”

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Figure3-15:VisualStudio8+Nextwefixittobe abletoruntheprogramcorrectly:

Figure3-16:VisualStudio9+wekeeprunningagain

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3.3

Explain the debugging process and explain the debugging facilitiesavailableintheIDE.(P4)

- Debugging is the process of detecting and removing of existing and potentialerrors(alsocalledas‘bugs’)inasoftwarecodethatcancauseittobehaveunexpectedlyorcrash.Topreventincorrectoperationofa softwareorsystem,debuggingisusedtofindand resolve bugs or defects. When various subsystems or modules are tightly coupled,debuggingbecomesharderasany changeinonemodulemay causemorebugstoappearinanother.Sometimesittakesmoretimetodebugaprogramthantocodeit.

Here’sthedebugging process:1.Reproduce theproblem.

2.Describethebug.Tryto getasmuchinputfromtheusertogettheexactreason.

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3.Capturetheprogramsnapshotwhenthebugappears.Trytoget allthevariablevaluesandstatesofthe programatthattime.

4.Analysethesnapshotbasedonthestateandaction.Basedonthattryto findthecauseofthebug.

5.Fixtheexistingbug,butalsocheckthat anynewbugdoesnotoccur.[7]

- Debuggingisa processthattakesalotoftime,especially logicrelatederrorsthataredifficulttofindandfix. SoVisualStudioprovidesa debuggingtool,makingdebuggingsimpler,easierandfaster.

-HereIwillwritesome aprojectandlearnthecommonmistakeswhilecodingExampledebugging 1

- Thisis acommonerrorwhenweaccidentallydeletethesign {}orforgettousethissigninthe code,this is a branchmarkfor statements,in thestring {}containsC# statementsthatwhenthe functionis calledit willexecute.followthelogic ofthecodefromstarttofinish,orwhenencounteringthecommandreturn;

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-firstIneedaprojectwithcodeandform:

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-Clickontheerrormessagelineitwilldisplaytheerror codeforus.Andthatwillmakeusawareof errorsandfixthemeasily

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Figure3-23:TestingExampledebugging 3

- Whenwefinishwritingacommandline, wewilladdasemicolon (;),rightafterthecodewewritetoletthe systemknowthatwehaveendedthecurrentcommandline.

- andthefollowingisthemissingsyntaxerror(;)thesystemimmediatelyreportserrorsandforces us to fix them.

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Figure3-24:Bug-ErrorCS1002 ;expected,fix asfollows:-weclickon2errors onthemessengerbar

- The error here is line 30 and 31, when the error, the system provides us informationabouttheerror,andweperformtheerror correction.

Somenotesinnaming:

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-Thenamemustnotcoincidewiththekeywordofthelanguage.-Theclass namemust startwith a capitalletter.

-Namethevariableextensively,explainits effect,whyitexists,andthevalueitreturns.-Name cannot begin with a number. It must begin with an underscore _ or a lettercharacter.

- The name given must clarify the meaning, avoid being misled, misinterpreting theproblem

-Avoidusingabbreviationsin parameternames andIDs,if abbreviated, useCamelCasefornaming.Namingrules:

- Donameinterfaceswith adjectivephrases, oroccasionally withnounsornoun phrases.- Doprefixinterface nameswith theletter I, to indicatethat thetypeis aninterface.-It shouldbeensuredthatthe namesdifferonlyby the"I"prefixonthe interfacenamewhenyouaredefininganinterface-classpairwheretheclass isastandardimplementationoftheinterface.

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-Donotprefixtheclass name(example:"C'').

- Dogivemethodsnamesthatareverbsor verbphrases.

- Donamepropertiesusinganoun,nounphrase,oradjective.

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- Donamecollectionpropertieswithapluralphrasedescribingtheitemsinthecollectioninsteadofusingasingularphrasefollowedby"List"or"Collection".

- Considergivingapropertythesamenameasitstype.

- Do nameeventswithaverbor averbphrase.

- Dogiveeventsnameswithaconceptof beforeandafter,usingthepresentandpasttenses.

- Donotuse"Before"or"After"prefixesorpostfixestoindicatepre-andpost-events.Usepresentandpasttensesasjustdescribed.

- Donameeventargumentclasseswiththe"EventArgs"suffix.NameofFields[8]

- DousePascalCaseinfieldnames.

- Do namefieldsusing anoun, nounphrase,oradjective.- Donotuseaprefixforfieldnames.

Example:Iwillwriteasynthesisproblem

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Figure3-32:ex1Severalmethodsof namingobjects

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<small>+ Result:</small>

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Figure:3-36:ex3

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Through the last report, I have applied the knowledge I havelearnedinclassandlearnedonlinetosuccessfullycompletethelessonprogram.IthinkthatIstillhavesomeshortcomings,Istillhavetolearnmore,butIdid mybestandcompletedtheexamassoonaspossible.Iwilltrynexttime.

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After completing this report, I understood and grasped how tobuild a basic algorithm, models such as procedural programming,functional procedures, object-orientedand event-oriented programming,IDE capabilities , debugging programs and compilation processes.Thankyou.

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8.type-members

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