c++primerplus第六版课后编程练习答案.docx

1、c+primerplus第六版课后编程练习答案第二章：开始学习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; coutfur

2、; 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;void mice() coutthree blind miceendl;vo

3、id see() coutsee how they runendl;/ex2.4#includeint main() using namespace std; coutage; int month; month=age*12; coutage years is month monthsendl; return 0;/ex2.5-convert the Celsius valve to Fahrenheit value#includedouble C2F(double);int main()using namespace std;coutC;double F;F=C2F(C);coutC deg

4、rees Celsius is F degrees Fahrenheit.endl;return 0;double C2F(double t)return 1.8*t+32; /ex2.6-convert 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;coutlight_years;double astro_units;astro_units=convert(light_years);coutlight

5、_years light_years = astro_units astronomical units.endl;return 0;double convert(double t)return 63240*t;/1 光年=63240 天文单位 /ex2.7-显示用户输入的小时数和分钟数#includevoid show();main()using namespace std;show();return 0;void show()using namespace std;int h,m;couth;coutm;coutTime:h:mendl;第三章：处理数据/ex3.1将身高用英尺(feet)和

6、英寸(inch)表示#includeconst int inch_per_feet=12;/ const常量-1feet=12inches-1英尺=12英寸int main() using namespace std; coutht_inch; int ht_feet=ht_inch/inch_per_feet;/取商 int rm_inch=ht_inch%inch_per_feet;/取余 coutyour height is ht_feet feet,and rm_inch inchesn; return 0;/ex3.2-计算相应的body mass index（体重指数）#inclu

7、deconst int inch_per_feet=12;const double meter_per_inch=0.0254;const double pound_per_kilogram=2.2;int main() using namespace std; coutPlease enter your height:endl; coutht_feet; coutht_inch; coutwt_pound; int inch; inch=ht_feet*inch_per_feet+ht_inch; double ht_meter; ht_meter=inch*meter_per_inch;

8、double wt_kilogram; wt_kilogram=wt_pound/pound_per_kilogram; coutendl; coutYour pensonal body information as follows:endl; cout身高:inch(英尺inch)n身高:ht_meter(米meter)n 体重:wt_kilogram(千克kilogram)n; double BMI; BMI=wt_kilogram/(ht_meter*ht_meter); coutyour Body Mass Index(体重指数) is BMIendl; return 0;/ex3.3

9、 以度，分，秒输入，以度输出#includeconst int minutes_per_degree=60;const int seconds_per_minute=60;int main() using namespace std; coutEnter a latitude in degrees,minutes,and seconds:n; coutdegree; coutminute; coutsecond; double show_in_degree; show_in_degree=(double)degree+(double)minute/minutes_per_degree+(dou

10、ble)second/minutes_per_degree/seconds_per_minute; coutdegree degrees,minute minutes,secondseconds =show_in_degree degreesn; return 0;/ex3.4#includeconst int hours_per_day=24;const int minutes_per_hour=60;const int seconds_per_minute=60;int main() using namespace std; coutseconds; int Day,Hour,Minute

11、,Second; Day=seconds/seconds_per_minute/minutes_per_hour/hours_per_day; Hour=seconds/seconds_per_minute/minutes_per_hour%hours_per_day; Minute=seconds/seconds_per_minute%minutes_per_hour; Second=seconds%seconds_per_minute; coutsecondsseconds = Day days,Hour hours,Minute minutes,Second secondsn; retu

12、rn 0;/ex3.5#includeint main() using namespace std; coutworld_population; coutUS_population; double percentage; percentage=(double)US_population/world_population*100; coutThe population of the US is percentage% of the world population.n; return 0;/ex3.6? 汽车耗油量-美国(mpg)or欧洲风格(L/100Km)#includeint main()

13、?using namespace std;?coutm_distance;?coutm_gasoline;?coutYour car can run m_distance/m_gasoline miles per gallonn;?coutComputing by European style:n;?coutk_distance;?coutk_gasoline;?coutIn European style:your can used 100*k_gasoline/k_distance liters of petrol per 100 kilometersn;?return 0;/ex3.7 a

14、utomobile gasoline consumption-耗油量-欧洲风格(L/100Km)转换成美国风格(mpg)#includeint main() using namespace std; coutEnter the automobile gasoline consumption figure inn Euro_style; coutConverts to U.S. style(miles per gallon):endl; coutEuro_style L/100Km = 62.14*3.875/Euro_style mpgn; return 0;/ Note that 100 k

15、ilometers is 62.14 miles, and 1 gallon is 3.875 liters. /Thus, 19 mpg is about 12.4 L/100Km, and 27 mpg is about 8.7 L/100Km.Enter the automobile gasoline consumption figure inEuropean style(liters per 100 kilometers):12.4Converts to U.S. style(miles per gallon):12.4 L/100Km = 19.4187 mpgPress any k

16、ey to continue/ ex3.7 automobile gasoline consumption-耗油量-美国风格(mpg)转换成欧洲风格(L/100Km)#includeint main() using namespace std; coutEnter the automobile gasoline consumption figure inn US_style; coutConverts to European style(miles per gallon):endl; coutUS_style mpg = 62.14*3.875/US_styleL/100Kmn; return

17、 0;/ Enter the automobile gasoline consumption figure inU.S. style(miles per gallon):19Converts to European style(miles per gallon):19 mpg = 12.6733L/100KmPress any key to continue第四章 复合类型/ex4.1 display the information of student#includeconst int Asize=20;using namespace std;struct student/定义结构描述 ch

18、ar firstnameAsize; char lastnameAsize; char grade; int age;void display(student);/函数原型放在结构描述后int main() coutwhat is your first name?endl; student lcg;/创建结构变量（结构数据对象） cin.getline(lcg.firstname,Asize); coutwhat is your last name?endl; cin.getline(lcg.lastname,Asize); coutwhat letter grade do you deser

19、ve?lcg.grade; coutwhat is your age?lcg.age; display(lcg); return 0;void display(student name) coutName: name.firstname,name.lastnameendl; coutGrade:char(name.grade+1)endl; coutAge:name.ageendl;/ex4.2 use the string-class instead of char-array#include#includeint main() using namespace std; string nam

20、e,dessert; coutEnter your name: n; getline(cin,name); coutEnter your favorite dessert: n; getline(cin,dessert); coutI have some delicious dessert; cout for you, namesbumpc();/修改后的 break; ex4.3 输入其名和姓，并组合显示#include#includeconst int Asize=20;int main() using namespace std; char fnameAsize; char lnameA

21、size; char fullname2*Asize+1; coutEnter your first name:;/输入名字，存储在fname数组中 cin.getline(fname,Asize); coutEnter your last name:;/输入姓，存储在lname数组中 cin.getline(lname,Asize); strncpy(fullname,lname,Asize);/把姓lname复制到fullname空数组中 strcat(fullname, );/把“， ”附加到上述fullname尾部 strncat(fullname,fname,Asize);/把fna

22、me名字附加到上述fullname尾部 fullname2*Asize=0;/为防止字符型数组溢出，在数组结尾添加结束符 coutHeres the information in a single string:fullnameendl;/显示组合结果 return 0;/ex4.4 使用string对象 存储、显示组合结果#include#includeint main() using namespace std; string fname,lname,attach,fullname; coutEnter your first name:; getline(cin,fname);/note:

23、将一行输入读取到string类对象中使用的是getline(cin,str) /它没有使用句点表示法，所以不是类方法 coutEnter your last name:; getline(cin,lname); attach=, ; 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 Asize=20;struct CandyBar char brandAsize; double weight; int calory;int