C 语言程序设计第四版例7-10个人银行账户管理程序

//Date,h

#ifndefDATEH_

^define_DATE_H_

classDate{

private:

intyear;

intmonth;

intday;

inttotalDays;

public:

Date(intyear,intmonth,intday);

intgetYear()const(

returnyear;

}

intgetMonth0const{

returnmonth;

}

intgetDay()const(

returnday;

}

intgetMaxDay()const;

boolisLeapYearOconst(

returnyeai'%4==C&&year%100!=0year%400==0;

}

voidshow()const;

〃计算两个日期之间差多少天

intdistance(constDatc&date)const{

returntotalDays-date.totalDays;

}

}；

#endif

“Accumulator,h

iiifndef_ACCUMULATOR」］

^define_ACCUMULATOR_H

^include"Date,h”

classAccumulator!

private:

DatelastDate;

doublevalue;

doublesum;

public:

〃构造函数，date开始累加的日期，value为初始值

Accumulator(constDaleSdate,doublevalue):lastDalc(date),value(value),sum(O){：

〃获得U期date的累加结果

doublegctSum(constDate&datc)const{

returnsum+valu€*date.distance(lastDate);

}

〃在date将数值变更为value

voidchange(constDate&date,doublevalue){

sum=getSum(date);

lastDate=date;this->va1ue=va1ue;

}

voidreset(constDate&date,doublevalue){

lastDate=date;

this->va1ue=va1ue;

sum=0;

)

)；

#endif

//Accout.h

#ifndef_ACC0UNT_H_

切efine_ACCOUNT_H_

#include"Date,h”

#include"Accumulator,h”

#include<string>

classAccount{

private:

std::stringid;

doublebalance;

staticdoubletotal;

protected:

〃供派生类调用的构造函数，id为账户

Account(constDate&date,conststd::string&id);

〃记录一笔括账，date为日期，amount为金额，desc为说明

voidrecord(constDate&date,doubleamount,conststd::string&desc);

〃报告错误信息

voiderror(conststd::string&msg)const;

public:

conststd::string&getld()const{returnid;}

doubIegetBalanceOconst{returnbalance：)

staticdoublegetTotal(){returntotal：)

〃显示账户信息

voidshow()const：

}；

classSavingsAccount:pub]icAccount{

private:

Accumulatoracc;

//doublecredit;

doublerate;

public:

〃构造函数

SavingsAccount(constDate&date,conststd::string&id,doublerate);

doublegetRateOconst(returnrate;}

〃存入现金

voiddeposit(constDate&date,doubleamount,conststd::string&desc);

〃取出现金

voidwithdraw(constDate&date,doubleamount,conststd::string&desc);

voidsettle(constDace&date);

}；

classCreditAccount:publicAccount{

private:

Accumulatoracc;

doublecredit;

doublerate;

doublefee;

doublegetDebt()const{

doublebalance=getBalance();

return(balance<O?balance:O);

}

public:

〃构造函数

CreditAccount(constDate&date,conststd::string&id,doublecredit,doublerate,double

fee);

doublegetCredit()const{returncredit;}

doublegetRateOconst{returnrate;}

doublegetFeeO(returnfee;}

doublegetAvai1ableCredit()const{

if(getBalance()<0)

returncredit+getBalance();

else

returncredit;

}

〃存入现金

voiddeposit(constDate&datc,doubleamount,conststd::string&desc)：

〃取出现金

voidwithdraw(constDate&datc,doubleamount,conststd::string&desc);

voidsettle(constDate&date);

voidshow()const;

}：

#endif

//Date.epp

#include"Date,h”

Sinclude<iostream>

^include<csidlib>

usingnamespacestd;

namespace{//namespace使卜面的定义只在当前文件中有效

〃存储半年中的某3个月1日之前有多少天,为便于getMaxDay函数的实现，该数组多出一项

constintDAYS_BEF0R3_M0NTH[]=(0,31,59,90,120,15L181,212,243,273,304,334,365};

}

Date::Date(intyear,intnonth,intday):year(year),month(month),day(day){

if(day<=0day>geLMaxDay()){

cout«z，Invaliddate:";

show();

cout«endl;

exit(1);

}

intyears=year-l;

totalDays=ycars*365+ycars/4-ycars/l00+years/400+DAYS_BEFORE_MONTH[month-1]+day;

if(isLeapYeai'()&&month>2)

totalDays++;

}

intDate::getMaxDay()const{

if(isLeapYear()&&month==2)

return29;

else

returnDAYS_BEFORE_MONTH[month]-DAYS_BEFORE_MONTH[month-1];

}

voidDate::show()const{

cout«getYear()«z/*«getMonth0«*-z/«getDay0;

}

//Account.cpp

#include“Accout.h"

#include<cmalh>

#include<iostream>

usingnamespacestd;

doubleAccount::total=0;

〃Accounl类的实现

Account::Account(constDate&date,conststd:zstring&id):id(id),balance(0){

date,show();

cout"created”〈〈end1;

)

voidAccount::record(constDate&date,doubleamount,conststd::string&desc){

amount=floor(amount*100+0.5)/100;

balance+=amount;

total+=amount;

date.show();

cout«zz\t#/，«id«，，\t"«amount«，z\tz«balance<<"\tv«desc«endl;

)

voidAccount::show()const{cout«id<<~\tBalance:“〈〈balance;}

void?\ccount::error(conststring&msg)const{

cout<<MError(#"，<<id<(//):*«msg«endl;

}

〃SavingsAccount类相关成员函数的实现

SavingsAccount::SavingsAccount(constDate&date,conststd:zstring&id,double

rate):Account(date,id),rate(rate),acc(date,0)(}

voidSavingsAccount::deposit(constDateftdate,doubleunount,conststring&dcsc){

record(date,amount,desc);

acc.change(date,gctBalanceO);

}

voidSavingsAccount::withdraw(constDate&date,doubleamount,conststring&desc)(

if(amount>getBalance()){

error(zznotenoughmoney");

}

else(

record(date,-ameunt,desc);

acc.change(date,getBalance());

}

voidSavingsAccount::settle(constDate&date){

doubleinterest=acc.getSum(dale)*rate/dalc.distance(Date(date.getYcar()-1,1,l)j;

if(interest!=0)

record(date,interest,"interest");

acc.reset(date,getBalanceO);

)

//CreditAccount类相关成员函数的实现

CreditAccount::CreditAccount(constDate&date,conststring&id,doublecredit,double

rate,doublefee):Account(date,id),credit(crcdit),rate(rate),fee(fec),acc(date,0){}

voidCreditAccount::deposit(constDatedelate,doubleamount,conststring&desc){

record(date,amount,desc);

acc.change(date,getDebt());

)

voidCreditAccount::withdraw(constDate&date,double£mount,conststring&desc){

if(amount-getBalanceO>credit)(

error(^notenoughcredit");

}

else{

record(date,-ameunt,desc);

acc.change(date,getDebt()):

}

)

voidCreditAccount::settle(constDate&date){

doubIeinterest=acc.getSum(date)*rate;

if(interest!=0)

record(date,interest,“interest");

if(date.getMonth()==l)

record(date,-fee,“annualfee");

acc.reset(date,getDebt())：

}

voidCreditAccount::show()const{

Account::show();

cout«w\tAvailablecredit:*«getAvailableCredit();

)

//Lab7_10

#include“Accout.h"

#include<iostream>

usingnamespacestd;

intmain(){

Datedate(2008,11,1);

〃建立几个账户

SavingsAccountsal(date,*53755217",0.015):

SavingsAccountsa2