银行账户管理系统

基于C++实现的银行客户系统程序

以下代码放在brass.h中

#ifndef BRASS_H_

#define BRASS_H_

class Brass

{

private:

enum{MAX=35};

char fullName[MAX];

long acctNum;

double balance;

public:

Brass (const char *s = "Nullbody", long an = -1,

double bal = 0.0);

void Deposit(double amt);

virtual void Withdraw(double amt);

double Balance() const;

virtual void ViewAcct() const;

virtual ~Brass(){}

};

class BrassPlus : public Brass

{

private:

double maxLoan;

double rate;

double owesBank;

public:

BrassPlus(const char *s = "Nullbody", long an = -1,

double bal = 0.0, double m1 = 500, double r = 0.10);

BrassPlus(const Brass & ba, double m1 = 500, double r = 0.1);

virtual void ViewAcct() const;

virtual void Withdraw(double amt);

void ResetMax(double m){ maxLoan = m; }

void ResetRate(double r){ rate = r; }

void ResetOwes() { owesBank = 0; }

};

#endif

以下代码放在brass.cpp中

#include

#include

#include"brass.h"

using std::cout;

using std::ios_base;

using std::endl;

Brass::Brass(const char *s, long an, double bal)

{

strncpy_s(fullName, s, MAX - 1);

fullName[MAX - 1] = '\0';

acctNum = an;

balance = bal;

}

void Brass::Deposit(double amt)

{

if (amt < 0)

cout << "Megative deposit not allowed:"

<< "deposit is cancelled.\n";

else

balance += amt;

}

void Brass::Withdraw(double amt)

{

if (amt < 0)

cout << "Withdrawal amount must be positive:"

<< "withdrawal cancelled.\n";

else if (amt <= balance)

balance -= amt;

else

cout << "Withdrawal amount of $" << amt

<< " exceeds your balance.\n"

<< "Withdrawal cancelled.\n";

}

double Brass::Balance() const

{

return balance;

}

void Brass::ViewAcct() const

{

ios_base::fmtflags initialState =

cout.setf(ios_base::fixed, ios_base::floatfield);

cout.setf(ios_base::showpoint);

cout.precision(2);

cout << "Client: " << fullName << endl;

cout << "Account Number: " << acctNum << endl;

cout << "Balance: $" << balance << endl;

cout.setf(initialState);

}

BrassPlus::BrassPlus(const char *s ,long an, double bal, double m1, double r) : Brass(s, an, bal)

{

maxLoan = m1;

owesBank = 0.0;

rate = r;

}

BrassPlus::BrassPlus(const Brass & ba, double m1, double r) :Brass(ba)

{

maxLoan = m1;

owesBank = 0.0;

rate = r;

}

void BrassPlus::ViewAcct()const

{

ios_base::fmtflags initialState =

cout.setf(ios_base::fixed, ios_base::floatfield);

cout.setf(ios_base::showpoint);

cout.precision(2);

Brass::ViewAcct();

cout << "Maximum loan: $" << maxLoan << endl;

cout << "Owed to bank: $" << owesBank << endl;

cout << "Loan Rate: " << 100 * rate << "%\n";

cout.setf(initialState);

}

void BrassPlus::Withdraw(double amt)

{

ios_base::fmtflags initialState =

cout.setf(ios_base::fixed, ios_base::floatfield);

cout.setf(ios_base::showpoint);

cout.precision(2);

double bal = Balance();

if (amt <= bal)

Brass::Withdraw(amt);

else if (amt <= bal + maxLoan - owesBank)

{

double advance = amt - bal;

owesBank += advance*(1.0 + rate);

cout << "Bank advance: $" << advance << endl;

cout << "Finance charge: $" << advance*rate << endl;

Deposit(advance);

Brass::Withdraw(amt);

}

else

cout << "Credit limit exceeded. Transaction cancelled.\n";

cout.setf(initialState);

}

以下代码放在usebrass.cpp中

#include

#include"brass.h"

const int CLIENTS = 4; //客户数量

const int LEN = 40;

int main()

{

using std::cin;

using std::cout;

using std::endl;

Brass * p_clients[CLIENTS];

int i;

for (i = 0; i < CLIENTS; i++)

{

char temp[LEN];

long tempnum;

double tempbal;

char kind;

cout << "Enter Client`s name: ";

cin.getline(temp, LEN);

cout << "Enter client`s account number: ";

cin >> tempnum;

cout << "Enter opening balance: $";

cin >> tempbal;

cout << "Enter 1 for Brass Account or "

<< "2 for BrassPlus Account: ";

while (cin >> kind && (kind != '1' && kind != '2'))

cout << "Enter either 1 or 2: ";

if (kind == '1')

p_clients[i] = new Brass(temp, tempnum, tempbal);

else

{

double tmax, trate;

cout << "Enter the overdraft limit: $";

cin >> tmax;

cout << "Enter the interest rate "

<< "as a decimal fraction: ";

cin >> trate;

p_clients[i] = new BrassPlus(temp, tempnum, tempbal, tmax, trate);

}

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

continue;

}

cout << endl;

for (i = 0; i < CLIENTS; i++)

{

p_clients[i]->ViewAcct();

cout << endl;

}

for (i = 0; i < CLIENTS; i++)

{

delete p_clients[i];

}

cout << "Done.\n";

cin.get();

return 0;

}