c++primerplus第六版课后编程练习测试参考答案.docx

1、c+primerplus第六版课后编程练习测试参考答案第二章：开始学习C+/ex2.1-displayyournameandaddress#includeintmain(void) usingnamespacestd; coutMynameisliaochunguangandIliveinhunanchenzhou.n”；/ex2.2-convertthefurlongunitstoyarduints-把浪单位换位码单位#includedoublefur2yd(double);intmain() usingnamespacestd; coutfur; coutconvertthefurlong

2、toyardendl;doubleyd; yd=fur2yd(fur); coutfurfurlongisydyardendl; return0;doublefur2yd(doublet) return220*t;/ex2.3-每个函数都被调用两次#includevoidmice();voidsee();usingnamespacestd;intmain() mice(); mice(); see(); see(); return0;voidmice() coutthreeblindmiceendl;voidsee() coutseehowtheyrunendl;/ex2.4#includei

3、ntmain()usingnamespacestd;coutage;intmonth;month=age*12;coutageyearsismonthmonthsendl;return0;/ex2.5-converttheCelsiusvalvetoFahrenheitvalue#includedoubleC2F(double);intmain()usingnamespacestd;coutC;doubleF;F=C2F(C);coutCdegreesCelsiusisFdegreesFahrenheit.endl;return0;doubleC2F(doublet)return1.8*t+3

4、2;/ex2.6-convertthelightyearsvalvetoastronomicalunits-把光年转换为天文单位#includedoubleconvert(double);/函数原型intmain()usingnamespacestd;coutlight_years;doubleastro_units;astro_units=convert(light_years);coutlight_yearslight_years=astro_unitsastronomicalunits.endl;return0;doubleconvert(doublet)return63240*t;/1

5、光年=63240天文单位/ex2.7-显示用户输入的小时数和分钟数#includevoidshow();main()usingnamespacestd;show();return0;voidshow()usingnamespacestd;inth,m;couth;coutm;coutTime:h:mendl;第三章：处理数据/ex3.1将身高用英尺(feet)和英寸(inch)表示#includeconstintinch_per_feet=12;/const常量-1feet=12inches-1英尺=12英寸intmain() usingnamespacestd; coutht_inch; i

6、ntht_feet=ht_inch/inch_per_feet;/取商 intrm_inch=ht_inch%inch_per_feet;/取余 coutyourheightisht_feetfeet,and rm_inchinchesn; return0;/ex3.2-计算相应的bodymassindex（体重指数）#includeconstintinch_per_feet=12;constdoublemeter_per_inch=0.0254;constdoublepound_per_kilogram=2.2;intmain() usingnamespacestd; coutPleasee

7、nteryourheight:endl; coutht_feet; coutht_inch; coutwt_pound; intinch; inch=ht_feet*inch_per_feet+ht_inch; doubleht_meter; ht_meter=inch*meter_per_inch; doublewt_kilogram; wt_kilogram=wt_pound/pound_per_kilogram; coutendl; coutYourpensonalbodyinformationasfollows:endl; cout身高:inch(英尺inch)n身高:ht_meter

8、(米meter)n 体重:wt_kilogram(千克kilogram)n; doubleBMI; BMI=wt_kilogram/(ht_meter*ht_meter); coutyourBodyMassIndex(体重指数)isBMIendl; return0;/ex3.3以度，分，秒输入，以度输出#includeconstintminutes_per_degree=60;constintseconds_per_minute=60;intmain() usingnamespacestd; coutEnteralatitudeindegrees,minutes,andseconds:n; c

9、outdegree; coutminute; coutsecond; doubleshow_in_degree; show_in_degree=(double)degree+(double)minute/minutes_per_degree+(double)second/minutes_per_degree/seconds_per_minute; coutdegreedegrees,minuteminutes,secondseconds=show_in_degreedegreesn; return0;/ex3.4#includeconstinthours_per_day=24;constint

10、minutes_per_hour=60;constintseconds_per_minute=60;intmain() usingnamespacestd; coutseconds; intDay,Hour,Minute,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; Se

11、cond=seconds%seconds_per_minute; coutsecondsseconds=Daydays,Hourhours,Minuteminutes,Secondsecondsn; return0;/ex3.5#includeintmain()usingnamespacestd;coutworld_population;coutUS_population;doublepercentage;percentage=(double)US_population/world_population*100;coutThepopulationoftheUSispercentage%ofth

12、eworldpopulation.n;return0;/ex3.6?汽车耗油量-美国(mpg)or欧洲风格(L/100Km)#includeintmain()?usingnamespacestd;?coutm_distance;?coutm_gasoline;?coutYourcarcanrunm_distance/m_gasolinemilespergallonn;?coutComputingbyEuropeanstyle:n;?coutk_distance;?coutk_gasoline;?coutInEuropeanstyle:yourcanused100*k_gasoline/k_di

13、stancelitersofpetrolper100kilometersn;?return0;/ex3.7automobilegasolineconsumption-耗油量-欧洲风格(L/100Km)转换成美国风格(mpg)#includeintmain() usingnamespacestd; coutEntertheautomobilegasolineconsumptionfigureinn Euro_style; coutConvertstoU.S.style(milespergallon):endl; coutEuro_styleL/100Km=62.14*3.875/Euro_sty

14、lempgn; return0;/Notethat100kilometersis62.14miles,and1gallonis3.875liters./Thus,19mpgisabout12.4L/100Km,and27mpgisabout8.7L/100Km.EntertheautomobilegasolineconsumptionfigureinEuropeanstyle(litersper100kilometers):12.4ConvertstoU.S.style(milespergallon):12.4L/100Km=19.4187mpgPressanykeytocontinue/ex

15、3.7automobilegasolineconsumption-耗油量-美国风格(mpg)转换成欧洲风格(L/100Km)#includeintmain() usingnamespacestd; coutEntertheautomobilegasolineconsumptionfigureinn US_style; coutConvertstoEuropeanstyle(milespergallon):endl; coutUS_stylempg=62.14*3.875/US_styleL/100Kmn; return0;/Entertheautomobilegasolineconsumpti

16、onfigureinU.S.style(milespergallon):19ConvertstoEuropeanstyle(milespergallon):19mpg=12.6733L/100KmPressanykeytocontinue第四章复合类型/ex4.1displaytheinformationofstudent#includeconstintAsize=20;usingnamespacestd;structstudent/定义结构描述 charfirstnameAsize; charlastnameAsize; chargrade; intage;voiddisplay(stude

17、nt);/函数原型放在结构描述后intmain() coutwhatisyourfirstname?endl; studentlcg;/创建结构变量（结构数据对象） cin.getline(lcg.firstname,Asize); coutwhatisyourlastname?endl; cin.getline(lcg.lastname,Asize); coutwhatlettergradedoyoudeserve?lcg.grade; coutwhatisyourage?lcg.age; display(lcg); return0;voiddisplay(studentname) cout

18、Name:name.firstname,name.lastnameendl; coutGrade:char(name.grade+1)endl; coutAge:name.ageendl;/ex4.2usethestring-classinsteadofchar-array#include#includeintmain() usingnamespacestd; stringname,dessert; coutEnteryourname:n; getline(cin,name); coutEnteryourfavoritedessert:n; getline(cin,dessert); cout

19、Ihavesomedeliciousdessert; coutforyou,namesbumpc();/修改后的break;ex4.3输入其名和姓，并组合显示#include#includeconstintAsize=20;intmain() usingnamespacestd; charfnameAsize; charlnameAsize; charfullname2*Asize+1; coutEnteryourfirstname:;/输入名字，存储在fname数组中 cin.getline(fname,Asize); coutEnteryourlastname:;/输入姓，存储在lname

20、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fname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 coutHerestheinformationinasinglestring:fullnameendl;/显示组合结果 return0;/ex4.4使用strin

21、g对象存储、显示组合结果#include#includeintmain() usingnamespacestd; stringfname,lname,attach,fullname; coutEnteryourfirstname:; getline(cin,fname);/note: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 coutEnteryourlastname:; getline(cin,lname); attach=,; fullname=lname+attach+fname; coutHerestheinfo

22、rmationinasinglestring:fullnameendl; return0;/ex4.5declareastructandinitializeit声明结果并创建一个变量#includeconstintAsize=20;structCandyBar charbrandAsize; doubleweight; intcalory;intmain() usingnamespacestd; CandyBarsnack=MochaMunch,2.3,350; coutHerestheinformationofsnack:n; coutbrand:snack.brandendl; coutw

23、eight:snack.weightendl; coutcalory:snack.caloryendl; return0;/ex4.6结构数组的声明及初始化#includeconstintAsize=20;structCandyBar charbrandAsize; doubleweight; intcalory;intmain() usingnamespacestd; CandyBarsnack3= MochaMunch,2.3,350, XuFuJi,1.1,300, Alps,0.4,100 ;for(inti=0;i3;i+)/利用for循环来显示snack变量的内容 coutsnacki.brandendl snacki.weightendl snack