求助~~~不明白怎么弄了，请求帮改改。
编译能通过，可是运行结果不对……不知道问题所在。初学C++#include <iostream>
#include <string>
using namespace std;
/*创建一个名为BankAccount的基类，*****
**它的数据成员包括帐户所有人姓名******
**（一个字符串，假定命名为name），****
**以及帐户余额（double值）balance。***
**在类中添加成员函数deposit和withdraw*
**并添加取值函数getName和getBalance。*
**deposit(存款)，withdraw(取款)。*****
**存款将amount加到balance取款反之*/
class BankAccount
{
public:
BankAccount();
BankAccount(string the_name,double the_balance,double the_amount);
void set_name(string new_name);
void set_balance(double new_balance);
void set_amount(double new_amount);
string get_name() const;
double get_balance() const;
double get_amount() const;
void deposit();
//存款
void withdraw();
//取款
protected:
string name;
double balance;
double amount;
};
BankAccount::BankAccount():name("No name yet"),balance(0),amount(0)
{
//有意留空
}
BankAccount::BankAccount(string the_name,double the_balance,double the_amount)
:name(the_name),balance(the_balance),amount(the_amount)
{
//有意留空
}
string BankAccount::get_name() const
{
return name;
}
double BankAccount::get_balance() const
{
return balance;
}
double BankAccount::get_amount() const
{
return amount;
}
void BankAccount::set_name(string new_name)
{
name=new_name;
}
void BankAccount::set_balance(double new_balance)
{
balance=new_balance;
}
void BankAccount::set_amount(double new_amount)
{
amount=new_amount;
}
void BankAccount::deposit()
{
balance = balance + amount;
cout << "你的帐户名称为: " << name << endl;
cout << "你的余额为: "<< balance << endl;
}
void BankAccount::withdraw()
{
//withdraw函数都应返回一个表示帐户状态的证书（允许取款；或者余额不足，不允许取款）。
if ( balance >= amount )
balance = balance - amount;
else
cout << "余额不足，不允许取款!" << endl;
}
//----------------------------------------------------------------------------------------
/*它从BankAccount类派生。在一个MoneyMarketAccount中，
用户可以在一段优惠时间内两次免费取款。免费取款后，
以后每次取款都要从余额中扣除1.50美元的手续费。所以，
该类必须有一个数据成员来跟踪取款次数。另外，它还需要
覆盖withdraw定义。*/
class MoneyMarketAccount : public BankAccount
{
public:
MoneyMarketAccount();
MoneyMarketAccount(string the_name,double the_balance,double amount);
void withdraw();
//想要更改函数定义，只需要列出继承的哪个成员函数的声明
static int times;
};
int MoneyMarketAccount::times=0;
MoneyMarketAccount::MoneyMarketAccount() : BankAccount()
{
//主体空
}
MoneyMarketAccount::MoneyMarketAccount(string the_name,double the_balance,double the_amount)
:BankAccount(the_name,the_balance,the_amount)
{
//主体有意留空
}
void MoneyMarketAccount::withdraw()
{
//withdraw函数都应返回一个表示帐户状态的证书（允许取款；或者余额不足，不允许取款）。
const double A=1.50;
times++;
if( times <= 2 )
{
if ( balance >= amount)
balance = balance - amount;
else
cout<<"余额不足，不允许取款!" << endl;
}
else
{
if ( balance >= (amount - A) )
balance = balance-amount-A;
else
cout<<" 余额不足，不允许取款!" << endl;
}
cout << "你的帐户名称为: " << name << endl;
cout << "你还剩余:" << balance << endl;
}
//-----------------------------------------------------------------------------
/*同样从BankAccount派生。该类除了包含数据成员name和balance之外
还有一个名为interest_rate（利率）的数据成员。银行的规定是假如
提前取款，客户必须缴纳一定的提前取款罚金（prepayment penalty）。
假定一次取款操作（任意金额）会扣除帐户年利息的25%作为罚金。另外，
假定取款金额和罚金都从帐户余额中扣除。同样的，withdraw函数必须
覆盖基类的版本。对于所有这三个类withdraw函数都应返回一个
表示帐户状态的证书（允许取款；或者余额不足，不允许取款）。
考虑到练习的目的，暂时不关心这些帐户的其他函数和属性
（比如何时和怎样支付利息）。*/
class CDAccount : public BankAccount
{
public:
CDAccount();
CDAccount(string the_name,double the_balance,double the_amount,double interest_rate);
double get_interest_rate() const;
void set_interest_rate(double new_interest_rate);
void withdraw(); //重定义
protected:
double interest_rate; //利率
};
CDAccount::CDAccount():BankAccount(),interest_rate(0)
{
//空
}
CDAccount::CDAccount(string the_name,double the_balance,double the_amount,double the_interest_rate)
:BankAccount(the_name,the_balance,the_amount),interest_rate(the_interest_rate)
{
//nothing
}
double CDAccount::get_interest_rate() const
{
return interest_rate;
}
void CDAccount::set_interest_rate(double new_interest_rate)
{
interest_rate=new_interest_rate;
}
void CDAccount::withdraw()
{
//withdraw函数都应返回一个表示帐户状态的证书（允许取款；或者余额不足，不允许取款）。
const double B=0.25;
double C;
C= balance - amount - balance*interest_rate*B;
if ( balance >= C)
balance = C;
else
cout<<" 余额不足，不允许取款 " << endl;
cout << "你的帐户名称为: " << name << endl;
cout << "你还剩余:"<<balance<<endl;
}
//-----------------------------------------------------------------------------
void main()
{
double amount;
double balance;
double rate=0.01;
string yourname;
char ans;
char abc;
BankAccount a1(yourname,balance,amount);
MoneyMarketAccount a2(yourname,balance,amount);
CDAccount a3(yourname,balance,amount,rate);
a3.set_interest_rate(rate);
cout << "Please enter your money :" << endl ;
cin >> balance;
cout << "Please enter your name :" << endl;
cin >> yourname;
a1.set_balance(balance);
a1.set_name(yourname);
do
{
cout << "请输入你选择的操作:A为存款,B为正常取款,C为提前取款!" <<endl;
cin >> ans;
switch(ans)
{
case 'A': //存钱
cout<<"请输入存款金额:"<<endl;
cin>>amount;
a1.set_amount(amount);
a1.deposit();
break;
case 'B': //正常取钱
cout << " 请输入取款金额 : " << endl;
cin >> amount;
a2.set_amount(amount);
a2.withdraw();
break;
case 'C': //提前取钱
cout << " 请输入取款金额 : " << endl;
cin >> amount;
a3.set_amount(amount);
a3.withdraw();
break;
default :
cout << "没有这项操作！" <<endl;
break;
}
cout << "请问你还要继续操作吗? 继续请输入Y或者y." << endl;
cin >> abc ;
}while(abc == 'Y' || abc == 'y' );
}
