C++Primer Plus 第五版第十章习题参考答案

第第页C++PrimerPlus第五版第十章习题参考答案C++PrimerPlus第五版第十章习题参考答案

Chapter10

PE10-1

//pe10-1.cpp

#includeiostream

#includecstring

//classdeclaration

classBankAccount

{

private:

charname[40];

characctnum[25];

doublebalance;

public:

BankAccount(char*client=noone,char*num=0,

doublebal=0.0);voidshow(void)const;

voiddeposit(doublecash);voidwithdraw(doublecash);

};

//methoddefinitions

BankAccount::BankAccount(char*client,char*num,doublebal)

{

std::strncpy(name,client,39);

name[39]='\0';

std::strncpy(acctnum,num,24);

acctnum[24]='\0';

balance=bal;

}

voidBankAccount::show(void)const

{

usingstd::cout;

usingstd::endl;

coutClient:nameendl;

coutAccountNumber:acctnumendl;

coutBalance:balanceendl;

}

voidBankAccount::deposit(doublecash)

{

if(cash=0)

C++PrimerPlus第五版第十章习题参考答案

balance+=cash;

else

std::coutIllegaltransactionattempted;

}

voidBankAccount::withdraw(doublecash)

{

if(cash0)

std::coutIllegaltransactionattempted;

elseif(cash=balance)

balance-=cash;

else

std::coutRequestdeniedduetoinsufficientfunds.\n;

}

//sampleuse

intmain()

{

BankAccountbird;

BankAccountfrog(Kermit,croak322,123.00);

bird.show();

frog.show();

bird=BankAccount(Chipper,peep8282,214.00);

bird.show();

frog.deposit(20);

frog.show();

frog.withdraw(4000);

frog.show();

frog.withdraw(50);

frog.show();

}

PE10-4

//pe10-4.h

#ifndefSALES__

#defineSALES__

namespaceSALES

{

constintQUARTERS=4;

C++PrimerPlus第五版第十章习题参考答案

classSales

{

private:

doublesales[QUARTERS];

doubleaverage;

doublema*;

doublemin;

public:

//defaultconstructor

Sales();

//copiesthelesserof4ornitemsfromthearrayar

//tothesalesmemberandcomputesandstoresthe

//average,ma*imum,andminimumvaluesoftheentereditems;//remainingelementsofsales,ifany,setto0

Sales(constdoublear[],intn);

//gatherssalesfor4quartersinteractively,storesthem

//inthesalesmemberofobjectandcomputesandstoresthe

//average,ma*imum,andminumumvalues

voidsetSales();

//displayallinformationinobject

voidshowSales();

};

}

#endif

//pe10-4a.cpp

#includeiostream

#includepe10-4.h

intmain()

{

usingSALES::Sales;

doublevals[3]={2000,3000,5000};

SalesforFiji(vals,3);

forFiji.showSales();

Salesred;

C++PrimerPlus第五版第十章习题参考答案

red.showSales();

red.setSales();

red.showSales();

return0;

}

//pe10-4b.cpp

#includeiostream

#includepe10-4.h

namespaceSALES

{

usingstd::cin;

usingstd::cout;

usingstd::endl;

Sales::Sales(constdoublear[],intn)

{

if(n0)

n=0;

intlimit=nQUARTERS?n:QUARTERS;

doubletotal=0;

min=0;

ma*=0;

average=0;

if(limit0)

min=ma*=ar[0];

inti;

for(i=0;ilimit;i++)

{

sales[i]=ar[i];

total+=ar[i];

if(ar[i]ma*)

ma*=ar[i];

elseif(ar[i]min)

min=ar[i];

}

for(i=limit;iQUARTERS;i++)

sales[i]=0;

if(limit0)

average=total/limit;

}

C++PrimerPlus第五版第十章习题参考答案

Sales::Sales()

{

min=0;

ma*=0;

average=0;

for(inti=0;iQUARTERS;i++)

sales[i]=0;

}

voidSales::setSales()

{

doublesa[QUARTERS];

inti;

for(i=0;iQUARTERS;i++)

{

coutEntersalesforquarteri+1:;

cinsa[i];

}

//createtemporaryobject,copytoinvokingobject

*this=Sales(sa,QUARTERS);

}

voidSales::showSales()

{

coutSales:\n;

for(inti=0;iQUARTERS;i++)

coutQuarteri+1:$

sales[i]endl;

coutAverage:$averageendl;

coutMinimum:$minendl;

coutMa*imum:$ma*endl;

}

}

PE10-5

//pe10stack.h--classdefinitionforthestackADT

//forusewithpe10-5.cpp

#ifndef_STACK_H_

#define_STACK_H_

C++PrimerPlus第五版第十章习题参考答案

structcustomer{

charfullname[35];

doublepayment;

};

typedefcustomerItem;

classStack

{

private:

enum{MA*=10};//constantspecifictoclass

Itemitems[MA*];//holdsstackitems

inttop;//inde*fortopstackitem

public:

Stack();

boolisempty()const;

boolisfull()const;

//push()returnsfalseifstackalreadyisfull,trueotherwise

boolpush(constItemitem);//additemtostack

//pop()returnsfalseifstackalreadyisempty,trueotherwise

boolpop(Itemitem);//poptopintoitem

};

#endif

//pe10stack.cpp--Stackmemberfunctions

//forusewithpe10-5.cpp

//e*actlythesameasstack.cppinthete*t

#includepe10stack.h

Stack::Stack()//createanemptystack

{

top=0;

}

boolStack::isempty()const

{

returntop==0;

}

boolStack::isfull()const

{

returntop==MA*;

C++PrimerPlus第五版第十章习题参考答案

boolStack::push(constItemitem)

{

if(topMA*)

{

items[top++]=item;

returntrue;

}

else

returnfalse;

}

boolStack::pop(Itemitem)

{

if(top0)

{

item=items[--top];

returntrue;

}

else

returnfalse;

}

//pe10-5.cpp

#includeiostream

#includecctype

#includepe10stack.h//modifiedtodefinecustomerstructure//linkwithpe10stack.cpp

voidget_customer(customercu);

intmain(void)

{

usingnamespacestd;

Stackst;//createastackofcustomerstructures

customertemp;

doublepayments=0;

charc;

coutPleaseenterAtoaddacustomer,\n

Ptoprocessacustomer,andQtoquit.\n;

while(cinc(c=toupper(c))!='Q')

{

C++PrimerPlus第五版第十章习题参考答案

while(cin.get()!='\n')

continue;

if(c!='A'c!='P')

{

coutPleaserespondwithA,P,orQ:;

continue;

}

switch(c)

{

case'A':if(st.isfull())

coutstackalreadyfull\n;else

{

get_customer(temp);

st.push(temp);

}

break;

case'P':if(st.isempty())

coutstackalreadyempty\n;else{

st.pop(temp);

payments+=temp.payment;

couttemp.fullnameprocessed.;coutPaymentsnowtotal$payments\n;

}

break;

default:coutWhoops!Programmingerror!\n;}

coutPleaseenterAtoaddacustomer,\n

Ptoprocessacustomer,andQtoquit.\n;

}

coutDone!\n;

return0;

}

voidget_customer(customercu)

{

usingnamespacestd;

coutEntercustomername:;

cin.getline(cu.fullname,35);

coutEntercustomerpayment:;

cincu.payment;

while(cin.get()!='\n')

C++PrimerPlus第五版第十章习题参考答案

continue;

}

PE10-8

//pe10-8arr.h--headerfileforasimplelistclass

#ifndefSIMPLEST_

#defineSIMPLEST_

//program-specificdeclarations

constintTSIZE=45;//sizeofarraytoholdtitlestructfilm

{

chartitle[TSIZE];

intrating;

};

//generaltypedefinitions

typedefstructfilmItem;

constintMA*LIST=10;

classsimplist

{

private:

Itemitems[MA*LIST];

intcount;

public:

simplist(void);

boolisempty(void);

boolisfull(void);

intitemcount();

booladditem(Itemitem);

voidtransverse(void(*pfun)(Itemitem));

};

#endif

//pe10-8arr.cpp--functionssupportingsimplelistoperations#includepe10-8arr.h

simplist::simplist(void)

{

C++PrimerPlus第五版第十章习题参考答案

count=0;

}

boolsimplist::isempty(void)

{

returncount==0;

}

boolsimplist::isfull(void)

{

returncount==MA*LIST;

}

intsimplist::itemcount()

{

returncount;

}

boolsimplist::additem(Itemitem)

{

if(count==MA*LIST)

returnfalse;

else

items[count++]=item;

returntrue;

}

voidsimplist::transverse(void(*pfun)(Itemitem))

{

for(inti=0;icount;i++)

(*pfun)(items[i]);

}

//pe10-8.cpp--usingaclassdefinition

#includeiostream

#includecstdlib//prototypefore*it()

#includepe10-8arr.h//simplelistclassdeclaration//arrayversionvoidshowmovies(Itemitem);//tobeusedbytransverse()

intmain(void)

{

usingnamespacestd;

C++PrimerPlus第五版第十章习题参考答案

simplistmovies;//createsanemptylist

Itemtemp;

if(movies.isfull())//invokesisfull()memberfunction{

coutNomoreroominlist!Bye!\n;

e*it(1);

}

coutEnterfirstmovietitle:\n;

while(cin.getline(temp.title,TSIZE)temp.title[0]!='\0'){

coutEnteryourrating0-10:;

cintemp.rating;

while(cin.get()!='\n')

continue;

if(movies.additem(temp)==false)

{

coutListalreadyisfull!\n;

break;

}

if(movies.isfull())

{

coutYouhavefilledthelist.\n;

break;

}

coutEnterne*tmovietitle(emptylinetostop):\n;}

if(movies.isempty())

coutNodataentered.;

else

{

coutHereisthemovielist:\n;

movies.transverse(showmovies);

}

coutBye!\n;

return0;

}