C++PrimerPlus第六版编程习题解答.docx
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C++PrimerPlus第六版编程习题解答.docx
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C++PrimerPlus第六版编程习题解答
Chapter2
//pe2-2.cpp
#include
intmain(void)
{
usingnamespacestd;
cout<<"Enteradistanceinfurlongs:
";
doublefurlongs;
cin>>furlongs;
doublefeet;
feet=220*furlongs;
cout< < return0; } //pe2-3.cpp #include usingnamespacestd; voidmice(); voidrun(); intmain() { mice(); mice(); run(); run(); return0; } voidmice() { cout<<"Threeblindmice\n"; } voidrun() { cout<<"Seehowtheyrun\n"; } //pe2-4.cpp #include doubleC_to_F(double); intmain() { usingnamespacestd; cout<<"EnteratemperatureinCelsius: "; doubleC; cin>>C; doubleF; F=C_to_F(C); cout< < return0; } doubleC_to_F(doubletemp) { return1.8*temp+32.0; } Chapter3 //pe3-1.cpp #include constintInch_Per_Foot=12; intmain(void) { usingnamespacestd; //Note: someenvironmentsdon'tsupportthebackspacecharacter cout<<"Pleaseenteryourheightininches: ___/b/b/b"; intht_inch; cin>>ht_inch; intht_feet=ht_inch/Inch_Per_Foot; intrm_inch=ht_inch%Inch_Per_Foot; cout<<"Yourheightis"< cout< return0; } //pe3-3.cpp #include constdoubleMINS_PER_DEG=60.0; constdoubleSECS_PER_MIN=60.0; intmain() { usingnamespacestd; intdegrees; intminutes; intseconds; doublelatitude; cout<<"Enteralatitudeindegrees,minutes,andseconds: \n"; cout<<"First,enterthedegrees: "; cin>>degrees; cout<<"Next,entertheminutesofarc: "; cin>>minutes; cout<<"Finally,enterthesecondsofarc: "; cin>>seconds; latitude=degrees+(minutes+seconds/SECS_PER_MIN)/MINS_PER_DEG; cout< < return0; } //pe3-5.cpp #include intmain(void) { usingnamespacestd; cout<<"Howmanymileshaveyoudrivenyourcar? "; floatmiles; cin>>miles; cout<<"Howmanygallonsofgasolinedidthecaruse? "; floatgallons; cin>>gallons; cout<<"Yourcargot"< cout<<"milespergallon.\n"; return0; } //pe3-6.cpp #include constdoubleKM100_TO_MILES=62.14; constdoubleLITERS_PER_GALLON=3.875; intmain(void) { usingnamespacestd; doubleeuro_rating; doubleus_rating; cout<<"Enterfuelconsumptioninlitersper100km: "; cin>>euro_rating; //dividebyLITER_PER_GALLONtogetgallonsper100-km //dividebyKM100_TO_MILEStogetgallonspermile //invertresulttogetmilespergallon us_rating=(LITERS_PER_GALLON*KM100_TO_MILES)/euro_rating; cout< cout< return0; } Chapter4 //pe4-2.cpp--storingstringsinstringobjects #include #include intmain() { usingnamespacestd; stringname; stringdessert; cout<<"Enteryourname: \n"; getline(cin,name);//readsthroughnewline cout<<"Enteryourfavoritedessert: \n"; getline(cin,dessert); cout<<"Ihavesomedelicious"< cout<<"foryou,"< return0; } //pe4-3.cpp--storingstringsinchararrays #include #include constintSIZE=20; intmain() { usingnamespacestd; charfirstName[SIZE]; charlastName[SIZE]; charfullName[2*SIZE+1]; cout<<"Enteryourfirstname: "; cin>>firstName; cout<<"Enteryourlastname: "; cin>>lastName; strncpy(fullName,lastName,SIZE); strcat(fullName,","); strncat(fullName,firstName,SIZE); fullName[SIZE-1]='\0'; cout<<"Here'stheinformationinasinglestring: " < return0; } //pe4-5.cpp //acandybarstructure structCandyBar{ charbrand[40]; doubleweight; intcalories; }; #include intmain() { usingnamespacestd;//introducesnamespacestd CandyBarsnack={"MochaMunch",2.3,350}; cout<<"Brandname: "< cout<<"Weight: "< cout<<"Calories: "< return0; } //pe4-7.ccp #include constintSlen=70; structpizza{ charname[Slen]; floatdiameter; floatweight; }; intmain(void) { usingnamespacestd; pizzapie; cout<<"Whatisthenameofthepizzacompany? "; cin.getline(pie.name,Slen); cout<<"Whatisthediameterofthepizzaininches? "; cin>>pie.diameter; cout<<"Howmuchdoesthepizzaweighinounces? "; cin>>pie.weight; cout<<"Company: "< cout<<"Diameter: "< cout<<"Weight: "< return0; } Chapter5 //pe5-2.cpp #include intmain(void) { usingnamespacestd; doublesum=0.0; doublein; cout<<"Enteranumber(0toterminate): "; cin>>in; while(in! =0){ sum+=in; cout<<"Runningtotal="< cout<<"Enternextnumber(0toterminate): "; cin>>in; } cout<<"Bye! \n"; return0; } //pe5-4.cpp //booksales #include constintMONTHS=12; constchar*months[MONTHS]={"January","February","March","April", "May","June","July","August","September", "October","November","December"}; intmain() { usingnamespacestd;//introducesnamespacestd intsales[MONTHS]; intmonth; cout<<"Enterthemonthlysalesfor\"C++forFools\": \n"; for(month=0;month { cout<<"Salesfor"< "; cin>>sales[month]; } doubletotal=0.0; for(month=0;month total+=sales[month]; cout<<"Totalsales: "< return0; } //pe5-6.cpp #include structcar{charname[20];intyear;}; intmain(void) { usingnamespacestd; intn; cout<<"Howmanycarsdoyouwishtocatalog? : "; cin>>n; while(cin.get()! ='\n')//getridofrestofline ; car*pc=newcar[n]; inti; for(i=0;i { cout<<"Car#"<<(i+1)<<": \n"; cout<<"Pleaseenterthemake: "; cin.getline(pc[i].name,20); cout<<"Pleaseentertheyearmade: "; cin>>pc[i].year; while(cin.get()! ='\n')//getridofrestofline ; } cout<<"Hereisyourcollection: \n"; for(i=0;i cout< delete[]pc; return0; } //pe5-7.cpp--countwordsusingC-stylestring #include #include constintSTR_LIM=50; intmain() { usingnamespacestd; charword[STR_LIM]; intcount=0; cout<<"Enterwords(tostop,typetheworddone): \n"; while(cin>>word&&strcmp("done",word)) ++count; cout<<"Youenteredatotalof"< return0; } //pe5-9.cpp //nestedloops #include intmain() { usingnamespacestd;//introducesnamespacestd introws; introw; intcol; intperiods; cout<<"Enternumberofrows: "; cin>>rows; for(row=1;row<=rows;row++) { periods=rows-row; for(col=1;col<=periods;col++) cout<<'.'; //colalreadyhascorrectvaluefornextloop for(;col<=rows;col++) cout<<'*'; cout< } return0; } Chapter6 //pe6-1.cpp #include #include intmain() { usingnamespacestd;//introducesnamespacestd charch; cin.get(ch); while(ch! ='@') { if(! isdigit(ch)) { if(isupper(ch)) ch=tolower(ch); elseif(islower(ch)) ch=toupper(ch); cout< } cin.get(ch); } return0; } //pe6-3.cpp #include intmain(void) { usingnamespacestd; cout<<"Pleaseenteroneofthefollowingchoices: \n"; cout<<"c)carnivorep)pianist\n" <<"t)treeg)game\n"; charch; cin>>ch; while(ch! ='c'&&ch! ='p'&&ch! ='t'&&ch! ='g') { cout<<"Pleaseenterac,p,t,org: "; cin>>ch; } switch(ch) { case'c': cout<<"Acatisacarnivore.\n"; break; case'p': cout<<"RaduLupuisapianist.\n"; break; case't': cout<<"Amapleisatree.\n"; break; case'g': cout<<"Golfisagame.\n"; break; default: cout<<"Theprogramshouldn'tgethere! \n"; } return0; } //pe6-5.cpp //Neutroniataxation #include constdoubleLEV1=5000; constdoubleLEV2=15000; constdoubleLEV3=35000; constdoubleRATE1=0.10; constdoubleRATE2=0.15; constdoubleRATE3=0.20; intmain() { usingnamespacestd; doubleincome; doubletax; cout<<"Enteryourannualincomeintvarps: "; cin>>income; if(income<=LEV1) tax=0; elseif(income<=LEV2) tax=(income-LEV1)*RATE1; elseif(income<=LEV3) tax=RATE1*(LEV2-LEV1)+RATE2*(income-LEV2); else tax=RATE1*(LEV2-LEV1)+RATE2*(LEV3-LEV2) +RATE3*(income-LEV3); cout<<"YouoweNeutronia"< return0; } //pe6-7.cpp #include #include intmain() { usingnamespacestd; stringword; charch; intvowel=0; intconsonant=0; intother=0; cout<<"Enterwords(qtoquit): \n"; cin>>word; while(word! ="q") { ch=tolower(word[0]); if(isalpha(ch)) { if(ch=='a'||ch=='e'||ch=='i'||ch=='o' ||ch=='u') vowel++; else consonant++; } else other++; cin>>word; } cout< cout< cout<
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