C#期末考试试题3

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ḄB8BUsingsystem;ClassExamplei(Staticlongfib(intn)(If(n>2)return(fib(n-1)+fib(n-2));Elsererurn(2);}PublicStaticvoidmain(){Console.Writeline("{0}”,fib(3));})A.2B.4C.6D.813.ÁᵨÄÅGH@,Æ᪷È—Bᩭ⌱ÊᐹḄGH஺A.GHB.ÌᦪḄFᦪÂÍC.ÌᦪÎÌᦪFᦪ

18D.GHḄÏÐÑÍ14.ᑡḄ—DߟU᪀⌼ÕᦪḄᱯ×஺A.᪀⌼ÕᦪḄÕᦪÂØVB.᪀⌼Õᦪ®RÄÅC.᪀⌼Õᦪ®RÙᨵÌᦪD.®Rᢣ᪀⌼ÕᦪḄÏÐÑ15.¥ÛBᵫAÝÞßᩭ2AᨵNF'MḄàáGH,âᙠCDᙠBãNF'MḄGH2äCDåæ@U&âçèéê,ᑣᙠB\][GH@2Yqᵨ—B—GH஺A.staticB.newC.overrideD.virtual16.ᑡᐵtry…catch…finaly!Ḅ¢]2UḄ__D஺A.catchᙽ®Rᨵ³FB.finalyC.catchᙽã®⌱ḄD.®R£ᨵtryᙽ17.R᪗îf2Ḅ_ï—஺A._nNameB.typeofC.6bD.x5#18.☢ᨵᐵñòfḄ¢HḄ_D—A.òóñòfUIôõöÍ,String*ø=fgÍùÂObject*øôüÍùMPòóñòB.ᐵñòḄ”=="ÂýÑñòfḄ"="ØVḄC.sizeofñòfᵨᩭþÿ
ᦪᡈ⊤Ḅᙠᑁᡠᓰᑁᜧ⁚ᦪD.ᙠ!"Ḅ#ᐜ%&ᨬ(Ḅ,*+,ᦋ.⊤Ḅ!/019.4☢6789:;<=Ḅ&_C—஺A.78CDEFGHᵨB.78;DKL68C.78+,MN68D.+,MOP᝱20.4☢6TUVW;<=Ḅ&_D_A.try/catchᙽFG`abcUḄdᔠB.ᙠᣓgTUhi+,ᨵPkcatchᙽ

19C.lmTU&ᔲbo,finallyᙽpq᡻sD.tryᙽtfinally;Duᵨ1.C#ivwx"y.zstr,{|"y஻Tom'sLivingRoom”~ᑮyiᑣHᵨ4ᑡᩩAA.stringstr=஻Tom\'sLivingRoom”;B.stringstr="Tom'sLivingRoom”;C.stringstr("Tom'sLivingRoom");D.stringstrC'Tom^sLivingRoom");2.ᑖ᪆4ᑡ0Apublicclassclass4(privatestring_sData=஻஻publicstringsData{set{_sData=value;}})ᙠMainᦪiᙠᡂwḄ68obji4ᑡ&ᔠWḄA.obj.sData=஻Itisfunny!”;B.Console.WriteLine(obj.sData);C.obj._sData=100;D.obj.set(obj.sData);3.ᑖ᪆4ᑡ0MyClassḄKLclassBaseClass{publicinti;}classMyClass:BaseClass{publicnewinti;}ᑣ4ᑡᙠConsoleḄF__D.MyClassy=newMyClass();BaseClassx=y;x.i=100;Console.WriteLine(7z{0},{1}z7,x.i,y.i);஻(:MyClassḄnewᐵ)A.0,0B.100,100C.0,100D.100,04.ᙠḄKLiḄ_B9:Ḅ68ḄsFᱯ¢஺A.£B.¤W

20C.ᡠ¥Ḅ£D.¦ᨵ§5.ᐵ©C#0Ḅ«ᑏi4ᑡ;<=ḄVW&_D_஺A.ᑖᜧᑏB.xs+,ᑏPᩩC.xᩩ+ᑏᡂPsD.xkCDᨵxkMain஺¤Wi±²Pk+,ᨵPkMain஺¤W6.D<=⊤´µᐵ¶“aு=10ᡈa<=0”ḄC#¼⊤&_D_0A.a>=10ora<=0B.a>=10|a<=0C.a>=10&&a<=0D.a>=10|a<=07.if☢Ḅ⊤&_B_0A.´µ⊤B.ᩩÃ⊤C.!Ä⊤D.Å⊤8.,4Ç:<=Ḅ&_D_஺A.do-,while᪀ᡂḄÎÏ;DᵨᐸÑ᪀ᡂḄÎÏᩭÓÔB.do….while᪀ᡂḄÎÏCDᵨbreak⌨C.ᵨdo….while᪀ᡂḄÎÏiᙠwhileḄ⊤FtruehÚÛÎÏD.ᵨdo….while᪀ᡂḄÎÏiᙠwhileḄ⊤Fᐵ¶⊤ᡈ´µ⊤9.,40ḄÚÜ&CClassExamplel(PublicStaticvoidmain()(IntI;Int[]a=newint[10];For(i=9;i>=0;i—)a[i]=10-I;Console.Writeline(u{0},{1}{2}”,a[2],a[5],a[8]);})A.258B.741C.852

21D.36910.ᐵ©C#¼Ḅ¤Wi4ᑡÇ:<=Ḅ&_ïx0A.¤WḄKL;Dðᝅiò¤Wóᵨ+,ôᝅB.¤WḄKL+,ðᝅiò¤Wóᵨ;DðᝅC.¤WḄKLtóᵨõ;DðᝅD.¤WḄKLtóᵨõ+,ðᝅ11.4ᑡ0ḄÚÜ&BUsingsystem;ClassExamplel(Staticlongfib(intn)(If(n>2)return(fib(n-1)+fib(n-2));Elsererurn(2);}PublicStaticvoidmain(){Console.Writeline({0}'',fib(3));})A.2B.4C.6D.812.óᵨúû¤Wh,¶ü᪷—Bᩭ⌱ÿᐹ
Ḅ஺A.B.ᦪḄᦪC.ᦪᦪᦪD.Ḅ13.ᑡḄ_D᪀⌼ᦪḄᱯ"஺A.᪀⌼ᦪḄᦪ#$B.᪀⌼ᦪ%&'(C.᪀⌼ᦪ%&)ᨵᦪD.%&ᢣ,᪀⌼ᦪḄ14.ClassAᨵ12MlḄ4ᙠ678ᨵ᝞1:;ṹ4Ꮇ>?:;ṹ%&᡻AḄ4ᑣC⛲MlE1,FᵨH—B_C⛲J஺C1assAobj=newClassA();ClassA.Ml();A.publicB.staticC.private

22D.virtual15.2H]^ᙠ678ᣓ`ᡠᨵḄbc,ᙠcatchfgḄhi8FᵨḄ2A஺A.ExceptionB.DivideByZeroExceptionC.FormatExceptionD.&qrᙳ%16.ᐵvbc,ᑡḄw8xyḄ_D஺A.ᵨᡝ%&᪷|◤⌕bcB.ᙠᵨ%throwfgbcᵨC.ᵨᡝ%&,bcD.ᙠC#8ᨵḄbc]ᣓ`17.&8,vḄ—D_஺A.᦮ᦪB,C.JD.18.ᑡḄxyḄ_A_.A.intNO.1B.charuseC.floatMainD.char@use19.ᙠ,E,᝞Ḅ]^ᙠ81¡Aᦋ4&ᜐᳮ$ḄḄ◤⌕,ᑣ¥¦?§¨ᡂ_C_஺A.sealedB.publicC.virtualD.override20.2H¦J¬str“123,456”°ᣚᡂ᦮ᦪ123456,¥?Fᵨ&²ᩩfg?AA.intNum=int.Parse(str);B.intNum=str.Parse(int);C.intNum=(int)str;D.intNum=int.Parse(str,Globalization.NumberStyles.AllowThousands);ஹ▅⚪(ºᜧ⚪ᐳ5¾⚪4¿¾⚪5,ᐳ25

231.ᑏ&67ḄÁAÂ஺usingSystem;classTest(publicstaticvoidMain()(intx=5;inty=x++;Console.WriteLine(y);y=++x;Console.WriteLine(y);2.ᑏᑡᦪḄÇ]஺staticfloatFH(){floaty=0,n=0;intx=Convert.Tolnt32(Console.ReadLine());஻ÌÍÎÏᐭ᦮ᦪ|Ñxwhile(x!=-l){n++;y+=x;x=Convert.Tolnt32(Console.ReadLine());)if(n==0)returny;

24elsereturny/n;)3.ᑏ&67ḄÇ]஺staticvoidf2(refdoublet]a,intn){inti;doublesum=0;for(i=0;i=sum)Console,write(a[i]+““)ÙConsole.writeLine();)4.ᑏ&67ÁAÂ஺usingSystem;classTest(staticvoidLE(refinta,refintb){intx=a;a=b;b=x;Console.writeLine(a+“"+b);publicstaticvoidMain()

25intx=10,y=25;LE(refx,refy);Console.writeLine(x+""+y);5.ᑏ&67ḄÁAÂ஺usingSystem;classTest(publicstaticvoidMain()(int[]a={2,4,6,8,10,12,14,16,18);for(inti=0;i<9;i++){Console,write(”+a[i]);if((i+l)%3==0)Console.writeLine();}))6..ᑏᑡᦪḄÇ]஺staticintSA(inta,intb)(if(a>b)return1;elseif(a==b)return0;

26elsereturn-1;}7.ᑏ&67ÁAÂ஺usingSystem;classTest(staticint[]a={1,2,3,4,5,6,7,8};publicstaticvoidMainO(intsO,si,s2;sO=si=s2=0;for(inti=0;i<8;i++)(switch(a[i]%3)(case0:sO+=Test.a[i];break;case1:si+=Test.a[i];break;case2:s2+=Test.a[i];break;Console.WriteLine(sO+஻஻+si+஻஻+s2);

278.ᑏ&67ÁAÂ஺usingSystem;classTestconstintN=5;publicstaticvoidMain(){inta=0;for(inti=l;i

2810.ᑏ&67ÁAÂ஺usingSystem;classTestpublicstaticvoidMain()(ints=0;for(inti=l;;i++){if(s>50)break;if(i%2==0)s+=i;)Console.writeLine(஻i,s=஻+i+஻4஻+s);})ஹ⚪(ºᜧ⚪ᐳ2¾⚪4ß1¾⚪10ᑖ4ß¾⚪15ᑖ4ᐳ25ᑖ)1.áᑏ1674,rfloatḄ4ᑖâÌÍÎqãᐭäå,ᯠçᵨifelse⌱éfgêäå8Ḅᨬ¾ᦪ4ᨬçãÂ஺2.á1674ãᐭ1᦮ᦪ4Fᵨifelsefg4᝞?ᦪᜧv0,ᑣì±100,ᔲᑣìq500,ãÂ஺3.á1674,14?8,ï☟᝱41ᵨᩭóôrõöḄᕜø4ù1ᵨᩭóôrõöḄ☢û஺üýrõörᩩþa,b,c,ÿᐸ☢ᵨMathḄSqrtOᨵ⊤Math.Sqrt(s*(s-a)*(s-b)*(s-c)),ᑭᵨ$%ᢣ'ᦪḄ)ᐸs=(a+b+c)/2஺ᙠ01ᐭ345675ᩩ9a,b,c,⌕;<ᵨ

29=>4?☟᝱%567ḄᕜCD☢஺EFGᙠ1ᐭ5675ᩩ9HIJKL$MḄᦪNᔠឋ஺4.Q34RS'TstudentD$ḄᡂᕒWXYZ[\]Dc_sharpRS^%ᡂ_`ᵨstudentaᡂbcs,ᑖebbcsḄᡂᕒfgᯠi1jbcs஺