C#入门经典课后习题答案.doc

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1、BeginningVisualC#2005ExerciseAnswersChapter1:IntroducingC#NoExercises.Chapter2:WritingaC#ProgramNoExercises.Chapter3:VariablesandExpressionsExercise1Question:Inthefollowingcode,howwouldwerefertothenamegreatfromcodeinthenamespacefabulous?namespacefabulous{//codeinfabulousnamespace}namespacesuper{

2、namespacesmashing{//greatnamedefined}}Answer:super.smashing.greatExercise2Question:Whichofthefollowingisnotalegalvariablename:a)myVariableIsGoodb)99Flakec)_floord)time2GetJiggyWidIte)wrox.comAnswer:b—becauseitstartswithanumberande—becauseitcontainsafullstopExercise3Question:Isthestring"supercali

3、fragilisticexpialidocious"toobigtofitinastringvariable?Why?Answer:No,thereisnotheoreticallimittothesizeofastringthatmaybecontainedinastringvariable.Exercise4Question:Byconsideringoperatorprecedence,listthestepsinvolvedinthecomputationofthefollowingexpression:resultVar+=var1*var2+var3<

4、Answer:The*and/operatorshavethehighestprecedencehere,followedby+,<<,andfinally+=.Theprecedenceintheexercisecanbeillustratedusingparenthesesasfollows:resultVar+=(((var1*var2)+var3)<<(var4/var5));Exercise5Question:Writeaconsoleapplicationthatobtainsfourintvaluesfromtheuseranddisplaystheirproduct.A

5、nswer:staticvoidMain(string[]args){intfirstNumber,secondNumber,thirdNumber,fourthNumber;Console.WriteLine("Givemeanumber:");firstNumber=Convert.ToInt32(Console.ReadLine());Console.WriteLine("Givemeanothernumber:");secondNumber=Convert.ToInt32(Console.ReadLine());Console.WriteLine("Givemeanothern

6、umber:");thirdNumber=Convert.ToInt32(Console.ReadLine());Console.WriteLine("Givemeanothernumber:");fourthNumber=Convert.ToInt32(Console.ReadLine());Console.WriteLine("Theproductof{0},{1},{2},and{3}is{4}.",firstNumber,secondNumber,thirdNumber,fourthNumber,firstNumber*secondNumber*thirdNumber*four

7、thNumber);}NotethatConvert.ToInt32()isusedhere,whichisn'tcoveredinthechapter.Chapter4:FlowControlExercise1Question:Ifyouhavetwointegersstoredinvariablesvar1andvar2,whatBooleantestcanyouperformtoseeifoneortheotherofthem(butno