c++-primer-plus(第六版)第二至第六章课后编程练习全部答案.docx

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1、其次章：起先学习C+ /ex2.1-display your name and address #includeint main(void)(using namespace std;coutMy name is liao chunguang and I live in hunan chenzhou.n； )/ex2.2-convert the furlong units to yard uints-把浪单位换位码单位 #includedouble fur2yd(double);int main()(using namespace std;coutenter the distance measu

2、red by furlong units:;double fur;cinfur;coutconvert the furlong to yardendl;double yd;yd=fur2yd(fur);coutfur furlong is yd yardendl;return 0;)double fur2yd(double t)(return 220*t;)ex2.3-每个函数都被调用两次#includevoid mice();void see();using namespace std;int main()(mice();mice();see();see();return 0;getline

3、(cin,fname);note:将一行输入读取到 string 类对象中运用的是 getline(cin,str) 它没有运用句点表示法，所以不是类方法coutEnter your last name:;getline(cinjname);attach=H,fullname=lname+attach+fname;coutHeres the information in a single string:,fullnameendl;return 0;)/ex4.5 declare a struct and initialize it 声明结果并创建一个变量#includeconst int As

4、ize=20;struct CandyBar(char brandAsize;double weight;int calory;)；int main()(using namespace std;CandyBar snack=Mocha Munch,2.3,350;coutHHeres the information of snack:n;coutbrand:snack.brandendl;coutweight:snack.weightendl;coutcalory:snack.caloryendl;return 0;)/ex4.6结构数组的声明及初始化#includeconst int Asi

5、ze=20;struct CandyBar(char brandfAsize;double weight;int calory;)；int main()using namespace std;CandyBar snack3=Mocha Munch”,2.3,350,XuFuJin,1.1,300,Alps;O.lOO；for(int i=0;i3;i+)利用for循环来显示snack变量的内容 (coutsnacki.brandendl snacki.weightendl snacki.caloryendlendl;return 0;)/ex4.7 pizza 披萨饼#include#incl

6、udeconst int Size=20;struct pizza声明结构 (char companySize;double diameter;double weight;)；int main() (using namespace std;pizza pie;创建一个名为pie的结构变量 coutWhats the name of pizza company:; cin.getline(pie pany,Size);coutWhats the diameter of pizza:; cinpie.diameter;coutWhats the weight of pizza:;cinpie.we

7、ight;coutcompany:pie panyendl;coutdiameter:,pie.diameterinches,endl; coutweight:pie.weightounchesendl;return 0; )/ex4.8 pizza pie披萨饼 运用new创建动态结构 #include#includeconst int Size=20;struct pizza声明结构 (char companySize;double diameter;double weight;)；int main()(using namespace std;pizza *pie=new pizza;运用

8、new创建动态结构 coutWhats the diameter of pizza:;cinpie-diameter;cin.get();读取下一个字符coutWhats the name of pizza company:;cin.get(pie-company,Size);coutWhats the weight of pizza:;cinpie-weight;cout,diameter:,pie-diameter inchesendl; coutcompany:pie-companyendl;coutweight:pie-weight ounchesendl; delete pie;/d

9、elete 释放内存return 0;)运用new动态支配数组一方法1#include#includeusing namespace std;struct CandyBar (string brand;double weight;int calory;)；int main()CandyBar *snack= new CandyBar3;snack0.brand=A;单个初始化由new动态支配的内存snackO.weight=l.l;snack0.calory=200;snackl.brand=B;snackl.weight=2.2;snackl.calory=400;snack2.brand=

10、C;snack2.weight=4.4;snack2.calory=500;for(int i=0;i3;i+)(cout ” brand: snacki.brand endl;cout weight: snacki.weight endl;cout ” calorie: snacki.calory endlendl;delete snack;return 0;)数组一方法1#include int main()(using namespace std;const int Size = 3;int successSize;coutEnter your success of the three

11、times 40 meters running:n;cin success0successlsuccess2;coutsuccessl:success0endl;coutsuccess2:,successlendl;coutsuccess3:,success2endl;double average=(success0+successl+success2)/3;coutaverage:averageendl;return 0;)/ex.4.10 array一方法 2#include #include int main()(using namespace std;arrayad=0;coutEnt

12、er your success of the three times 40 meters running:n;cin ad0adlad2;coutsuccessl:ad0endl;coutsuccess2:adlendl;coutsuccess3:ad2endl; ad3=(ad0+adl+ad2);coutaverage:ad3endl;return 0;)第五章循环和关系表达式ttinclude int main()(using namespace std;coutnumlnum2;int sum=0;for(int temp=numl;temp=num2;+temp)/or temp+

13、sum十=temp;cout，zThe sum fromto /，num2z/ is ，zsumendl;return 0;#include #includeint main()(using namespace std;arrayad=0;adl=ad0=lL;for(int i=2;i101;i+)adi=i*adi-l;for (int i=0;i101;i+)coutiz，! = z，adiendl;/ex.5.3ttinclude int main()(using namespace std;coutz/Please enter an integer: ；int sum=O, num;

14、while (cinnum) &num!=0)(sum+=num;coutzzSo far, the sum is z/sumendl;coutz/Please enter an integer: ；)return 0;)#include int main()(using namespace std;double suml,sum2;suml=sum2=0.0;int year=O;while(sum2=suml)(+year;suml+=10;sum2=(100+sum2)*0.05+sum2;cout“经过year”年后,Cleo的投资价值才能超过Daphne的投资价值。“endl;cou

15、t”此时，Cleo的投资价值为而Daphne的投资价值为sum2endl;return 0;#include const int MONTHS = 12;constchar*monthsMONTHS=“January, February, March, April”, May, June, July, August, Sept ember,October, November, December; int main() ( using namespace std; int salesMONTHS, sum=0;for(int i=0;iMONTHS;i+) cout”请输入在monthsi的C+

16、 For Fools的销售量：； cinsalesi; sum+=sales i;)cout这一年中的C+ For Fools的总销售量为：sumendl; return 0;)ttinclude const int MONTHS = 12;constchar*monthsMONTHS=“January, February, March, April”, May,June,July, August, Sept ember, October, November, December;const char* years 3 = 第一年，其次年，第三年;int main() (using namesp

17、ace std;int year_sale3, sum=0, sales3MONTHS;for(int i=0;i3;i+) int temp=0;coutyearsi的每个月销售量:，endl;for (int j=0;jMONTHS;j+) (cout请输入months j salesi j;temp+=salesi j;year salei=temp;sum+=year_salei;)for(int i=0;i3;i+)coutyears i 的销售量为：year_sale i endl;cout*这三年的总销售量为：sumendl;return 0;#include ttinclude

18、 using namespace std; struct carstring name; int year;)；int main() (coutnum). get ();car* ps=new carnum;for(int i=0;inum;+i) coutzzCar + ： n ； coutz，Please enter the make: ； getline(cin, psi. name);coutps i. year). get ();)cout，zHere is your collection: nz，;for(int i=0;inum;+i)coutps i. year ，psi. n

19、ameendl;delete 口 ps;return 0;iiinclude int main()(using namespace std;char word20;int sum=0;coutword;while(strcmp(word, done)sum+;cinword;)cout，zYou entered a total of /，sum/ words. n，;return 0;)include ttinclude int main ()using namespace std;string word;int sum=0;coutword;while (word!二done)sum+;ci

20、nword;)cout，zYou entered a total of sum words. n； return 0;)int main()using namespace std;coutnum;for(int i=0;il;j一) cout.；for(int k=O;k=i;+k)coutendl;) return 0;)第六章分支语句和逻辑运算符include Sinclude int main() (using namespace std;char ch; cin. get (ch);while(ch!=， ) (if(isdigit (ch) cin. get (ch); else i

21、f (islower(ch) ch=toupper(ch); elsech=tolower(ch);coutch; cin. get (ch);) return 0;void mice()(coutthree blind miceendl;)void see()( coutsee how they runHendl;)/ex2.4#include int main () using namespace std;coutage; int month;month=age*12;coutage，z years is month months，endl; return 0;)/ex2.5-conver

22、t the Celsius valve to Fahrenheit value#includedouble C2F(double);int main()(using namespace std;coutplease enter a Celsius value:;double C;cinC;double F;F=C2F(C);coutC degrees Celsius is F degrees Fahrenheit.endl; return 0;)double C2F(double t)(return 1.8*t+32;数组#include #include int main()(using n

23、amespace std;double sum=0, average=0;double num10;int i=0,total=0;double temp;while (cintemp&i10&!isdigit(temp) numi=temp; sum+=numi;+i；if(i!=0)average=sum/i;for(int j=0;javerage) +total;cout这些数字的平均值为averageendl; cout。并且共有个数字大于平均值。n;return 0;)itinclude #includeitinclude int main()using namespace std

24、;double sum=0, average=0;arrayad=0;int i=0, total=0;double temp;while (cintemp&iaverage) +total;cout这些数字的平均值为averageendl;coutG并且共有total个数字大于平均值。n；return 0; )/ex.6.3#include int main()(using namespace std;cout，zPlease enter one of the following choices: n，z，zc) carnivorep)pianistn，zt) treeg) gamenfnz

25、，;书上的这个f个人认为是打印错误coutch;while (ch!=c &ch!=，p &ch!=，t &ch!=，g )coutch;)switch(ch)coutz，A maple is a carnivore. nzz; break;case p:coutzzA maple is a pianist. n，z;break;case t:coutz，A maple is a tree. n，z; break;case g :coutzzA maple is a game. n;)return 0;include const int strsize=20;struct bopchar fu

26、llnamestrsize;char title strsize;char bopnamestrsize;int preference;；int main()(using namespace std;coutz，Benevolent Order of Programmers Reportn ，za. display by nameb. display by titlen c. display by bopnamed. diplay by preferencen/z z，q. quitnz，;char ch;bop member5=Wimp Macho, English Teacher, DEM

27、ON”, 0,，zRaki Rhodes, Junior Programmer”,1,“Celia Laiter, “Super Star, MIPS, 2, “Hoppy Hipman, Analyst Trainee”, WATEE，1, z，Pat Hand, Police, LOOPY, 2)；coutch&ch!=，q)(switch(ch)case a:for(int i=0;i5;i+) coutmemberi. fullnameendl; break;case b，:for(int i=0;i5;i+) coutmemberi. titleendl; break;case c，

28、:for(int i=0;i5;i+) coutmemberi. bopnameendl; break;case d，:for(int i=0;i5;i+)(if (memberi. preference=O) coutmemberi. fullnameendl;else if (memberi. preference=l) coutmemberi. titleendl;else if(memberi. preference=2) coutmemberi. bopnameendl;) break;)coutz/Next choice: ；)cout，zBye! nz，;return 0;tti

29、nclude int main()using namespace std;double income, revenue;cout 请输入你的收入：；while(cinincome&income=0) (if (income=5000)revenue=0. 0;else if(income=15000)revenue=0. 1* (income-5000);else if(income=35000)revenue=0.1*(15000-5000)+0. 15*(income-15000);elserevenue=0.1*(15000-5000)+0.15*(35000-15000)+0. 2*

30、(income-35000);cout你的所得税为revenueendl;cout 请输入你的收入：；) return 0;)/ex.6.6ttinclude #include using namespace std;struct patron string name;double money;)；int main() (int num, temp-0;cout* 请输入捐款的人数：； cinnum;cin. get ();patron *ps=new patronnum;for(int i=0;inum;+i) (cout 请输入第 i+lpsi. money;cin. get ();)co

31、ut，zGrand Patrons :nzz;for(int i=0;i10000) (coutpsi. name，n/zpsi. moneyendl; +temp;)if (temp-0) cout，znonenz/;coutz/Patrons: n;for(int i=0;inum;+i) if (psij. money=10000) coutpsi. namezznzzpsi. moneyendl; +temp;)if(temp=0) coutz/nonen/z;delete ps;return 0;itinclude ttinclude int main()using namespac

32、e std;int vowel=0, consonant=0, other=0;char word15;coutword)(if(isalpha(word0)(if (word0=，q &strlen (word) =1) break;else if (word0=，a) | |word0=，i word0=，u | | word0=，| | word0=，) +vowel;else+consonant;)else+other;)coutvowelz，words beginning with vowelsn，?;coutconsonantz，words beginning with conso

33、nantsnz，; coutother/ othersn；return 0;include ttinclude ttinclude int main()(using namespace std;char ch;int sum=0;ifstream inFile;inFile, open(zzabc. txt);if (! inFile, is open()coutz/Could not open the file n; coutch;while (inFile, good ()+sum;inFilech;)if (inFile, eof ()coutz/End of file reached.

34、 nz，;else if (inFile, fail ()cout，zInput terminated by data mismatch. nz/;elsecoutz，Input terminated for unkonwn reason. nzz;cout总共有个字符在这个文件中。endl; return 0;/ex.6.9ttinclude #include itinclude struct memberchar name20;double donation;)；int main()(using namespace std;int num,count 1=0, count2=0;ifstr

35、eam fin;char file20;coutz，Enter name of data file:cin. getline(file,20);fin. open(file);if (!fin. is open() (coutz/Could not open the f ile-z，f ileendl; coutnum;fin. get ();member *pd=new membernum;for(int i=0;ipdi. donation;fin. get ();coutz/Grand Patrons:n/z;for(int i=0;i=10000) (coutpdi. name，znz

36、zpdi. donationendl; countl+;)if (countl=0)cout，znonenz/;coutz/Patrons: n ；for(int i=0;inum;i+) if(pdi. donation10000) (coutpdi. name，znzzpdi. donationendl; count2+;)if (count2=0) coutz，nonen/z;delete pd;return 0;/ex2.6convert the light years valve to astronomical units-把光年转换为天文单位 #includedouble convert(double);函数原型int main()(using namespace std;coutEnter the number of light years:;double light_years;cinlight_years;double astro_units;astro_units=convert(light_years);coutlight_years light_years = astro_units astronomical units.endl;return 0;)double convert(double t)(return 63