编译原理龙书答案完整性高第二章2.2ExercisesforSection2.22.2.1Considerthecontext-freegrammar:S-＞SS+|SS*|aShowhowthestringaa+a*canbegeneratedbythisgrammar.Constructaparsetreeforthisstring.Whatlanguagedoesthisgrammargenerate?Justifyyouranswer.answerS-＞SS*-＞SS+S*-＞aS+S*-＞aa+S*-＞aa+a*L={Postfixexpressionconsistingofdigits,plusandmultiplesigns}2.2.2Whatlanguageisgeneratedbythefollowinggrammars?Ineachcasejustifyyouranswer.S-＞0S1|01S-＞+SS|-SS|aS-＞S(S)S|εS-＞aSbS|bSaS|ε⧗S-＞a|S+S|SS|S*|(S)answerL={0n1n|n＞=1}L={Prefixexpressionconsistingofplusandminussigns}L={Matchedbracketsofarbitraryarrangementandnesting,includesε}L={Stringhasthesameamountofaandb,includesε}？2.2.3WhichofthegrammarsinExercise2.2.2areambiguousanswerNoNoYesYesYes2.2.4Constructunambiguouscontext-freegrammarsforeachofthefollowinglanguages.Ineachcaseshowthatyourgrammariscorrect.Arithmeticexpressionsinpostfixnotation.Left-associativelistsofidentifiersseparatedbycommas.Right-associativelistsofidentifiersseparatedbycommas.Arithmeticexpressionsofintegersandidentifierswiththefourbinaryoperators+,-,*,/.answer1.E-＞EEop|num2.list-＞list,id|id3.list-＞id,list|id4.expr-＞expr+term|expr-term|termterm-＞term*factor|term/factor|factorfactor-＞id|num|(expr)5.expr-＞expr+term|expr-term|termterm-＞term*unary|term/unary|unaryunary-＞+factor|-factorfactor-＞id|num|(expr)2.2.5Showthatallbinarystringsgeneratedbythefollowinggrammarhavevaluesdivisibleby3.Hint.Useinductiononthenumberofnodesinaparsetree.num-＞11|1001|num0|numnumDoesthegrammargenerateallbinarystringswithvaluesdivisibleby3?answerproveanystringderivedfromthegrammarcanbeconsideredtobeasequenceconsistingof11,1001and0,andnotprefixedwith0.thesumofthisstringis:sum=Σn(21+20)*2n+Σm(23+20)*2m=Σn3*2n+Σm9*2mItisobviouslycandivisibleby3.No.Considerstring"10101",itisdivisibleby3,butcannotderivedfromthegrammar.Question:anygeneralprove?2.2.6Constructacontext-freegrammarforromannumerals.Note:wejustconsiderasubsetofromannumeralswhichislessthan4k.answerwikipedia:Roman_numeralsviawikipedia,wecancategorizethesinglenomannumeralsinto4groups:I,II,III|IV|V,VI,VII,VIII|IXthengettheproduction:digit-＞smallDigit|IV|VsmallDigit|IXsmallDigit-＞I|II|III|εandwecanfindasimplewaytomapromantoarabicnumerals.Forexample:XII=＞X,II=＞10+2=＞12CXCIX=＞C,XC,IX=＞100+90+9=＞199MDCCCLXXX=＞M,DCCC,LXXX=＞1000+800+80=＞1880viatheuppertworules,wecanderivetheproduction:romanNum-＞thousandhundredtendigitthousand-＞M|MM|MMM|εhundred-＞smallHundred|CD|DsmallHundred|CMsmallHundred-＞C|CC|CCC|εten-＞smallTen|XL|LsmallTen|XCsmallTen-＞X|XX|XXX|εdigit-＞smallDigit|IV|VsmallDigit|IXsmallDigit-＞I|II|III|ε2.3ExercisesforSection2.32.3.1Constructasyntax-directedtranslationschemethattranslatesarithmeticexpressionsfrominfixnotationintoprefixnotationinwhichanoperatorappearsbeforeitsoperands;e.g.,-xyistheprefixnotationforx-y.Giveannotatedparsetreesfortheinputs9-5+2and9-5*2.。
answerproductions:expr-＞expr+term|expr-term|termterm-＞term*factor|term/factor|factorfactor-＞digit|(expr)translationschemes:expr-＞{print("+")}expr+term|{print("-")}expr-term|termterm-＞{print("*")}term*factor|{print("/")}term/factor|factorfactor-＞digit{print(digit)}|(expr)2.3.2Constructasyntax-directedtranslationschemethattranslatesarithmeticexpressionsfrompostfixnotationintoinfixnotation.Giveannotatedparsetreesfortheinputs95-2*and952*-.answerproductions:expr-＞exprexpr+|exprexpr-|exprexpr*|exprexpr/|digittranslationschemes:expr-＞expr{print("+")}expr+|expr{print("-")}expr-|{print("(")}expr{print(")*(")}expr{print(")")}*|{print("(")}expr{print(")/(")}expr{print(")")}/|digit{print(digit)}AnotherreferenceanswerE-＞{print("(")}E{print(op)}E{print(")"}}op|digit{print(digit)}2.3.3Constructasyntax-directedtranslationschemethattranslatesintegersintoromannumeralsanswerassistantfunction:repeat(sign,times)//repeat('a',2)='aa'translationschemes:num-＞thousandhundredtendigit{num.roman=thousand.roman||hundred.roman||ten.roman||digit.roman;print(num.roman)}thousand-＞low{thousand.roman=repeat('M',low.v)}hundred-＞low{hundred.roman=repeat('C',low.v)}|4{hundred.roman='CD'}|high{hundred.roman='D'||repeat('X',high.v-5)}|9{hundred.roman='CM'}ten-＞low{ten.roman=repeat('X',low.v)}|4{ten.roman='XL'}|high{ten.roman='L'||repeat('X',high.v-5)}|9{ten.roman='XC'}digit-＞low{digit.roman=repeat('I',low.v)}|4{digit.roman='IV'}|high{digit.roman='V'||repeat('I',high.v-5)}|9{digit.roman='IX'}low-＞0{low.v=0}|1{low.v=1}|2{low.v=2}|3{low.v=3}high-＞5{high.v=5}|6{high.v=6}|7{high.v=7}|8{high.v=8}2.3.4Constructasyntax-directedtranslationschemethattranslatesromannumeralsintointegers.answerproductions:romanNum-＞thousandhundredtendigitthousand-＞M|MM|MMM|εhundred-＞smallHundred|CD|DsmallHundred|CMsmallHundred-＞C|CC|CCC|εten-＞smallTen|XL|LsmallTen|XCsmallTen-＞X|XX|XXX|εdigit-＞smallDigit|IV|VsmallDigit|IXsmallDigit-＞I|II|III|εtranslationschemes:romanNum-＞thousandhundredtendigit{romanNum.v=thousand.v||hundred.v||ten.v||digit.v;print(romanNun.v)}thousand-＞M{thousand.v=1}|MM{thousand.v=2}|MMM{thousand.v=3}|ε{thousand.v=0}hundred-＞smallHundred{hundred.v=smallHundred.v}|CD{hundred.v=smallHundred.v}|DsmallHundred{hundred.v=5+smallHundred.v}|CM{hundred.v=9}smallHundred-＞C{smallHundred.v=1}|CC{smallHundred.v=2}|CCC{smallHundred.v=3}|ε{hundred.v=0}ten-＞smallTen{ten.v=smallTen.v}|XL{ten.v=4}|LsmallTen{ten.v=5+smallTen.v}|XC{ten.v=9}smallTen-＞X{smallTen.v=1}|XX{smallTen.v=2}|XXX{smallTen.v=3}|ε{smallTen.v=0}digit-＞smallDigit{digit.v=smallDigit.v}|IV{digit.v=4}|VsmallDigit{digit.v=5+smallDigit.v}|IX{digit.v=9}smallDigit-＞I{smallDigit.v=1}|II{smallDigit.v=2}|III{smallDigit.v=3}|ε{smallDigit.v=0}2.3.5Constructasyntax-directedtranslationschemethattranslatespostfixarithmeticexpressionsintoequivalentprefixarithmeticexpressions.answerproduction:expr-＞exprexprop|digittranslationscheme:expr-＞{print(op)}exprexprop|digit{print(digit)}ExercisesforSection2.42.4.1Constructrecursive-descentparsers,startingwiththefollowinggrammars:S-＞+SS|-SS|aS-＞S(S)S|εS-＞0S1|01Answer1）S-＞+SS|-SS|avoidS(){switch(lookahead){case"+":match("+");S();S();break;case"-":match("-");S();S();break;case"a":match("a");break;default:thrownewSyntaxException();}}voidmatch(Terminalt){if(lookahead=t){lookahead=nextTerminal();}else{thrownewSyntaxException()}}2）S-＞S(S)S|εvoidS(){if(lookahead=="("){S();match("(");S();match(")");S();}}3）S-＞0S1|01voidS(){switch(lookahead){case"0":match("0");S();match("1");break;case"1"://match(epsilon);break;default:thrownewSyntaxException();}}ExercisesforSection2.62.6.1ExtendthelexicalanalyzerinSection2.6.5toremovecomments,definedasfollows:Acommentbeginswith//andincludesallcharactersuntiltheendofthatline.Acommentbeginswith/*andincludesallcharactersthroughthenextoccurrenceofthecharactersequence*/.2.6.2ExtendthelexicalanalyzerinSection2.6.5torecognizetherelationaloperators.2.6.3ExtendthelexicalanalyzerinSection2.6.5torecognizefloatingpointnumberssuchas2.,3.14,and.5.AnswerSourcecode:commit8dd1a9aCodesnippet(src/lexer/Lexer.java)：publicTokenscan()throwsIOException,SyntaxException{for(;;peek=(char)stream.read()){if(peek==''||peek=='\t'){continue;}elseif(peek=='\n'){line=line+1;}else{break;}}//handlecommentif(peek=='/'){peek=(char)stream.read();if(peek=='/'){//singlelinecommentfor(;;peek=(char)stream.read()){if(peek=='\n'){break;}}}elseif(peek=='*'){//blockcommentcharprevPeek='';for(;;prevPeek=peek,peek=(char)stream.read()){if(prevPeek=='*'&&peek=='/'){break;}}}else{thrownewSyntaxException();}}//handlerelationsignif("".indexOf(peek)＞-1){StringBufferb=newStringBuffer();b.append(peek);peek=(char)stream.read();if(peek=='='){b.append(peek);}returnnewRel(b.toString());}//handlenumber,notypesensitiveif(Character.isDigit(peek)||peek=='.'){BooleanisDotExist=false;StringBufferb=newStringBuffer();do{if(peek=='.'){isDotExist=true;}b.append(peek);peek=(char)stream.read();}while(isDotExist==true?Character.isDigit(peek):Character.isDigit(peek)||peek=='.');returnnewNum(newFloat(b.toString()));}//handlewordif(Character.isLetter(peek)){StringBufferb=newStringBuffer();do{b.append(peek);peek=(char)stream.read();}while(Character.isLetterOrDigit(peek));Strings=b.toString();Wordw=words.get(s);if(w==null){w=newWord(Tag.ID,s);words.put(s,w);}returnw;}Tokent=newToken(peek);peek='';returnt;}ExercisesforSection2.82.8.1For-statementsinCandJavahavetheform:for(exprl;expr2;expr3)stmtThefirstexpressionisexecutedbeforetheloop;itistypicallyusedforinitializingtheloopindex.Thesecondexpressionisatestmadebeforeeachiterationoftheloop;theloopisexitediftheexpressionbecomesO.Theloopitselfcanbethoughtofasthestatement{stmtexpr3;}.Thethirdexpressionisexecutedattheendofeachiteration;itistypicallyusedtoincrementtheloopindex.Themeaningofthefor-statementissimilartoexpr1;while(expr2){stmtexpr3;}DefineaclassForforfor-statements,similartoclassIfinFig.2.43.AnswerclassForextendsStmt{ExprE1;ExprE2;ExprE3;StmtS;publicFor(Exprexpr1,Exprexpr2,Exprexpr3,Stmtstmt){E1=expr1;E2=expr2;E3=expr3;S=stmt;}publicvoidgen(){E1.gen();Labelstart=newLable();Lalelend=newLable();emit("ifFalse"+E2.rvalue().toString()+"goto"+end);S.gen();E3.gen();emit("goto"+start);emit(end+":")}}2.8.2TheprogramminglanguageCdoesnothaveabooleantype.ShowhowaCcompilermighttranslateanif-statementintothree-addresscode.AnswerReplaceemit("isFalse"+E.rvalue().toString()+"goto"+after);withemit("ifNotEqual"+E.rvalue().toString()+"0goto"+after);oremit("isNotEqualZero"+E.rvalue().toString()+"goto"+after);
answerproductions:expr-＞expr+term|expr-term|termterm-＞term*factor|term/factor|factorfactor-＞digit|(expr)translationschemes:expr-＞{print("+")}expr+term|{print("-")}expr-term|termterm-＞{print("*")}term*factor|{print("/")}term/factor|factorfactor-＞digit{print(digit)}|(expr)2.3.2Constructasyntax-directedtranslationschemethattranslatesarithmeticexpressionsfrompostfixnotationintoinfixnotation.Giveannotatedparsetreesfortheinputs95-2*and952*-.answerproductions:expr-＞exprexpr+|exprexpr-|exprexpr*|exprexpr/|digittranslationschemes:expr-＞expr{print("+")}expr+|expr{print("-")}expr-|{print("(")}expr{print(")*(")}expr{print(")")}*|{print("(")}expr{print(")/(")}expr{print(")")}/|digit{print(digit)}AnotherreferenceanswerE-＞{print("(")}E{print(op)}E{print(")"}}op|digit{print(digit)}2.3.3Constructasyntax-directedtranslationschemethattranslatesintegersintoromannumeralsanswerassistantfunction:repeat(sign,times)//repeat('a',2)='aa'translationschemes:num-＞thousandhundredtendigit{num.roman=thousand.roman||hundred.roman||ten.roman||digit.roman;print(num.roman)}thousand-＞low{thousand.roman=repeat('M',low.v)}hundred-＞low{hundred.roman=repeat('C',low.v)}|4{hundred.roman='CD'}|high{hundred.roman='D'||repeat('X',high.v-5)}|9{hundred.roman='CM'}ten-＞low{ten.roman=repeat('X',low.v)}|4{ten.roman='XL'}|high{ten.roman='L'||repeat('X',high.v-5)}|9{ten.roman='XC'}digit-＞low{digit.roman=repeat('I',low.v)}|4{digit.roman='IV'}|high{digit.roman='V'||repeat('I',high.v-5)}|9{digit.roman='IX'}low-＞0{low.v=0}|1{low.v=1}|2{low.v=2}|3{low.v=3}high-＞5{high.v=5}|6{high.v=6}|7{high.v=7}|8{high.v=8}2.3.4Constructasyntax-directedtranslationschemethattranslatesromannumeralsintointegers.answerproductions:romanNum-＞thousandhundredtendigitthousand-＞M|MM|MMM|εhundred-＞smallHundred|CD|DsmallHundred|CMsmallHundred-＞C|CC|CCC|εten-＞smallTen|XL|LsmallTen|XCsmallTen-＞X|XX|XXX|εdigit-＞smallDigit|IV|VsmallDigit|IXsmallDigit-＞I|II|III|εtranslationschemes:romanNum-＞thousandhundredtendigit{romanNum.v=thousand.v||hundred.v||ten.v||digit.v;print(romanNun.v)}thousand-＞M{thousand.v=1}|MM{thousand.v=2}|MMM{thousand.v=3}|ε{thousand.v=0}hundred-＞smallHundred{hundred.v=smallHundred.v}|CD{hundred.v=smallHundred.v}|DsmallHundred{hundred.v=5+smallHundred.v}|CM{hundred.v=9}smallHundred-＞C{smallHundred.v=1}|CC{smallHundred.v=2}|CCC{smallHundred.v=3}|ε{hundred.v=0}ten-＞smallTen{ten.v=smallTen.v}|XL{ten.v=4}|LsmallTen{ten.v=5+smallTen.v}|XC{ten.v=9}smallTen-＞X{smallTen.v=1}|XX{smallTen.v=2}|XXX{smallTen.v=3}|ε{smallTen.v=0}digit-＞smallDigit{digit.v=smallDigit.v}|IV{digit.v=4}|VsmallDigit{digit.v=5+smallDigit.v}|IX{digit.v=9}smallDigit-＞I{smallDigit.v=1}|II{smallDigit.v=2}|III{smallDigit.v=3}|ε{smallDigit.v=0}2.3.5Constructasyntax-directedtranslationschemethattranslatespostfixarithmeticexpressionsintoequivalentprefixarithmeticexpressions.answerproduction:expr-＞exprexprop|digittranslationscheme:expr-＞{print(op)}exprexprop|digit{print(digit)}ExercisesforSection2.42.4.1Constructrecursive-descentparsers,startingwiththefollowinggrammars:S-＞+SS|-SS|aS-＞S(S)S|εS-＞0S1|01Answer1）S-＞+SS|-SS|avoidS(){switch(lookahead){case"+":match("+");S();S();break;case"-":match("-");S();S();break;case"a":match("a");break;default:thrownewSyntaxException();}}voidmatch(Terminalt){if(lookahead=t){lookahead=nextTerminal();}else{thrownewSyntaxException()}}2）S-＞S(S)S|εvoidS(){if(lookahead=="("){S();match("(");S();match(")");S();}}3）S-＞0S1|01voidS(){switch(lookahead){case"0":match("0");S();match("1");break;case"1"://match(epsilon);break;default:thrownewSyntaxException();}}ExercisesforSection2.62.6.1ExtendthelexicalanalyzerinSection2.6.5toremovecomments,definedasfollows:Acommentbeginswith//andincludesallcharactersuntiltheendofthatline.Acommentbeginswith/*andincludesallcharactersthroughthenextoccurrenceofthecharactersequence*/.2.6.2ExtendthelexicalanalyzerinSection2.6.5torecognizetherelationaloperators.2.6.3ExtendthelexicalanalyzerinSection2.6.5torecognizefloatingpointnumberssuchas2.,3.14,and.5.AnswerSourcecode:commit8dd1a9aCodesnippet(src/lexer/Lexer.java)：publicTokenscan()throwsIOException,SyntaxException{for(;;peek=(char)stream.read()){if(peek==''||peek=='\t'){continue;}elseif(peek=='\n'){line=line+1;}else{break;}}//handlecommentif(peek=='/'){peek=(char)stream.read();if(peek=='/'){//singlelinecommentfor(;;peek=(char)stream.read()){if(peek=='\n'){break;}}}elseif(peek=='*'){//blockcommentcharprevPeek='';for(;;prevPeek=peek,peek=(char)stream.read()){if(prevPeek=='*'&&peek=='/'){break;}}}else{thrownewSyntaxException();}}//handlerelationsignif("".indexOf(peek)＞-1){StringBufferb=newStringBuffer();b.append(peek);peek=(char)stream.read();if(peek=='='){b.append(peek);}returnnewRel(b.toString());}//handlenumber,notypesensitiveif(Character.isDigit(peek)||peek=='.'){BooleanisDotExist=false;StringBufferb=newStringBuffer();do{if(peek=='.'){isDotExist=true;}b.append(peek);peek=(char)stream.read();}while(isDotExist==true?Character.isDigit(peek):Character.isDigit(peek)||peek=='.');returnnewNum(newFloat(b.toString()));}//handlewordif(Character.isLetter(peek)){StringBufferb=newStringBuffer();do{b.append(peek);peek=(char)stream.read();}while(Character.isLetterOrDigit(peek));Strings=b.toString();Wordw=words.get(s);if(w==null){w=newWord(Tag.ID,s);words.put(s,w);}returnw;}Tokent=newToken(peek);peek='';returnt;}ExercisesforSection2.82.8.1For-statementsinCandJavahavetheform:for(exprl;expr2;expr3)stmtThefirstexpressionisexecutedbeforetheloop;itistypicallyusedforinitializingtheloopindex.Thesecondexpressionisatestmadebeforeeachiterationoftheloop;theloopisexitediftheexpressionbecomesO.Theloopitselfcanbethoughtofasthestatement{stmtexpr3;}.Thethirdexpressionisexecutedattheendofeachiteration;itistypicallyusedtoincrementtheloopindex.Themeaningofthefor-statementissimilartoexpr1;while(expr2){stmtexpr3;}DefineaclassForforfor-statements,similartoclassIfinFig.2.43.AnswerclassForextendsStmt{ExprE1;ExprE2;ExprE3;StmtS;publicFor(Exprexpr1,Exprexpr2,Exprexpr3,Stmtstmt){E1=expr1;E2=expr2;E3=expr3;S=stmt;}publicvoidgen(){E1.gen();Labelstart=newLable();Lalelend=newLable();emit("ifFalse"+E2.rvalue().toString()+"goto"+end);S.gen();E3.gen();emit("goto"+start);emit(end+":")}}2.8.2TheprogramminglanguageCdoesnothaveabooleantype.ShowhowaCcompilermighttranslateanif-statementintothree-addresscode.AnswerReplaceemit("isFalse"+E.rvalue().toString()+"goto"+after);withemit("ifNotEqual"+E.rvalue().toString()+"0goto"+after);oremit("isNotEqualZero"+E.rvalue().toString()+"goto"+after);
2025/11/27 8:37:48
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你好呀 :waving_hand: ！我 :male_sign::male_sign:最新更新：使用Spring Boot和JAVA探索REST API设计 :goggles: 。
:pine_decoration:欢迎来到我的中心 :laptop: :man::graduation_cap: 21岁的计算机科学工程本科生。
:laptop: #SelfTaught开发人员。
:mobile_phone:移动应用程序开发人员。
:laptop:主要从事 :red_heart:安卓 :red_heart:Kotlin :fire:火力基地！ :globe_with_meridians:也很少探索Web开发。
:high_voltage:有趣的事实：幸福应该是没有任何参数的函数。
爱 :musical_note:和 :musical_keyboard: 。
自豪的 :India: 。
2025/6/18 22:17:20
2.37MB
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LK':camera_with_flash:店-电子商务:shopping_cart:现场LK'-:camera_with_flash:选购电子商务:shopping_cart:使用Asp.NetMVC技术制作的网站，使用C＃，HTML5，CSS3，JavaScript，Bootstrap，JQuery，Ajax，SQL和EntityFramework。
具有：管理面板:gear:通过它可以管理:laptop_computer:店铺内容如，滑块图像:framed_picture:在主页上，:heavy_plus_sign:添加产品，:wrench:管理产品，:male_sign_selector:管理用户，:globe_showing_Europe-Africa:管理位置等:confetti_ball:...只要在创建该项目时付出的努力就可以在任何地方使用它。
:)演示图片:framed_picture:：动态演示：:winking_face:现场演示。
:smiling_face_with_hea
具有：管理面板:gear:通过它可以管理:laptop_computer:店铺内容如，滑块图像:framed_picture:在主页上，:heavy_plus_sign:添加产品，:wrench:管理产品，:male_sign_selector:管理用户，:globe_showing_Europe-Africa:管理位置等:confetti_ball:...只要在创建该项目时付出的努力就可以在任何地方使用它。
:)演示图片:framed_picture:：动态演示：:winking_face:现场演示。
:smiling_face_with_hea
2025/3/25 14:06:44
30.28MB
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签名我们需要用到的工具是Auto-sign。
它主要是利用批处理命令，使用signapk.jar对APK文件进行签名的。
把new.apk文件复制到签名软件的目录下，再用记事本打开Sign.bat，将其修改为如下代码：java-jarsignapk.jartestkey.x509.pemtestkey.pk8XXX.apknewXXX.apkXXX.apk代表将要签名的，newXXX.apk签名后的最后双击一下Sign.bat即可签名完成，签名后的APK文件就可以在模拟器或者Android机器上安装了。
它主要是利用批处理命令，使用signapk.jar对APK文件进行签名的。
把new.apk文件复制到签名软件的目录下，再用记事本打开Sign.bat，将其修改为如下代码：java-jarsignapk.jartestkey.x509.pemtestkey.pk8XXX.apknewXXX.apkXXX.apk代表将要签名的，newXXX.apk签名后的最后双击一下Sign.bat即可签名完成，签名后的APK文件就可以在模拟器或者Android机器上安装了。
2024/12/12 13:32:16
2.23MB
1
最新版2.1安卓反编译利器：dex2jar此zip文件包含最新版本2.1的各种工具，包括d2j-dex2jar，d2j-jar2dex，d2j-dex2smali，d2j-apk-sign，d2j-dex2smali等。
5.35MB
1
有关Android开发的提示和技巧的备忘单。
这是我从各种来源收集到的一组有关Android开发的简单提示和技巧。
它可以帮助我指导社区中的其他android开发人员有关每个android开发人员应了解的知识。
我也可以随时随地浏览自己在互联网上或从其他来源学到的任何东西。
捐款总是值得欢迎的，希望人们能帮助我发展这一点。
要做出贡献，只需打开包含更改的PR。
显示一些:heart_suit_selector:和:glowing_star:支持项目的仓库精选于也包含在学分这个精选的备忘单包括我在工作流程中一直遵循的技巧和窍门以及全球其他android开发人员所建议/遵循的技巧和窍门。
。
如果您认为我错过了任何事宜，请发送公关或提出问题，我将尽快解决。
如果您欣赏我的工作，可以考虑一杯:hot_beverage:让我充电:sign_of_the_horns_medium-light_skin_tone:[]执照Copyright2016NishantSrivastavaLicensedundertheApacheLicense,Ve
这是我从各种来源收集到的一组有关Android开发的简单提示和技巧。
它可以帮助我指导社区中的其他android开发人员有关每个android开发人员应了解的知识。
我也可以随时随地浏览自己在互联网上或从其他来源学到的任何东西。
捐款总是值得欢迎的，希望人们能帮助我发展这一点。
要做出贡献，只需打开包含更改的PR。
显示一些:heart_suit_selector:和:glowing_star:支持项目的仓库精选于也包含在学分这个精选的备忘单包括我在工作流程中一直遵循的技巧和窍门以及全球其他android开发人员所建议/遵循的技巧和窍门。
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如果您认为我错过了任何事宜，请发送公关或提出问题，我将尽快解决。
如果您欣赏我的工作，可以考虑一杯:hot_beverage:让我充电:sign_of_the_horns_medium-light_skin_tone:[]执照Copyright2016NishantSrivastavaLicensedundertheApacheLicense,Ve
2024/9/5 6:58:32
26.55MB
1
2018worldfinal金牌吉老师几何板子structpoint{dbx,y;pointoperator+(constpoint&k1;)const{return(point){k1.x+x,k1.y+y};}pointoperator-(constpoint&k1;)const{return(point){x-k1.x,y-k1.y};}pointoperator*(dbk1)const{return(point){x*k1,y*k1};}pointoperator/(dbk1)const{return(point){x/k1,y/k1};}intoperator==(constpoint&k1;)const{returncmp(x,k1.x)==0&&cmp;(y,k1.y)==0;}pointturn(dbk1){return(point){x*cos(k1)-y*sin(k1),x*sin(k1)+y*cos(k1)};}pointturn90(){return(point){-y,x};}booloperator＜(constpointk1)const{inta=cmp(x,k1.x);if(a==-1)return1;elseif(a==1)return0;elsereturncmp(y,k1.y)==-1;}dbabs(){returnsqrt(x*x+y*y);}dbabs2(){returnx*x+y*y;}dbdis(pointk1){return((*this)-k1).abs();}pointunit(){dbw=abs();return(point){x/w,y/w};}voidscan(){doublek1,k2;scanf("%lf%lf",&k1;,&k2;);x=k1;y=k2;}voidprint(){printf("%.11lf%.11lf\n",x,y);}dbgetw(){returnatan2(y,x);}pointgetdel(){if(sign(x)==-1||(sign(x)==0&&sign;(y)==-1))return(*this)*(-1);elsereturn(*this);}intgetP()const{returnsign(y)==1||(sign(y)==0&&sign;(x)==-1);}};
2024/8/28 10:17:11
23KB
1
这个是zip格式的，压缩包中包含了apk-tool2.3.4&jd-gui-osx&dex2jar&auto-sign共四个工具。
用于apk的编译，反编译，查看源代码，修改源代码。
良心资源，放心下载。
用于apk的编译，反编译，查看源代码，修改源代码。
良心资源，放心下载。
2024/8/22 9:51:56
20.06MB
1
在日常工作中，钉钉打卡成了我生活中不可或缺的一部分。然而，有时候这个看似简单的任务却给我带来了不少烦恼。
每天早晚，我总是得牢记打开钉钉应用，点击"工作台"，再找到"考勤打卡"进行签到。有时候因为工作忙碌，会忘记打卡，导致考勤异常，影响当月的工作评价。而且，由于我使用的是苹果手机，有时候系统更新后，钉钉的某些功能会出现异常，使得打卡变得更加麻烦。
另外，我的家人使用的是安卓手机，他们也经常抱怨钉钉打卡的繁琐。尤其是对于那些不太熟悉手机操作的长辈来说，每次打卡都是一次挑战。他们总是担心自己会操作失误，导致打卡失败。
为了解决这些烦恼，我开始思考是否可以通过编写一个全自动化脚本来实现钉钉打卡。经过一段时间的摸索和学习，我终于成功编写出了一个适用于苹果和安卓系统的钉钉打卡脚本。
2024-04-09 15:03
15KB