윤성우의 열혈 c++) OOP 단계별 프로젝트 11단계

- 입출금 시 0 미만의 값 입력시 예외 발생, 처리 

- 출금 시 잔액보다 큰 금액 출금 요구 시 예외 발생, 처리 

 

ExceptionClass.h 

#ifndef __EXCEPTION_CLASS_H__
#define __EXCEPTION_CLASS_H__

// 입출금 진행 시 사용자로 부터 0보다 작은 값이 입력되는 예외 상황
class NotAllowedInputException
{
private:
    int money;
public:
    NotAllowedInputException(int _money) : money(_money) {}
    void ShowExceptionInfo()
    {
        cout << "입출금 금액 " << money << "는 유효하지 않습니다" << endl;
    }
};

// 출금 시 예금된 금액보다 더 많은 금액의 출금을 요구하는 예외 상황
class NotEnoughBalanceException
{
private:
    int balance;
    int money;
public:
    NotEnoughBalanceException(int _balance, int _money) : balance(_balance), money(_money) {}
    void ShowExceptionInfo()
    {
        cout << "현재 잔액은 " << balance << "입니다" << endl;
        cout << "요청하신 출금 금액은 " << money << "입니다" << endl;
    }
};


#endif // __EXCEPTION_CLASS_H__

 

Account.cpp

/*
 * 예외 발생
 */

#include "BankingCommon.h"
#include "Account.h"
#include "ExceptionClass.h"

Account::Account(int _accID, int _balance, String _cusName)
        : accID(_accID), balance(_balance)
{
    cusName = _cusName;
}

int Account::Get_accID() const { return accID; }

void Account::ShowAccInfo() const
{
    cout << "계좌ID: " << accID << endl;
    cout << "이 름: " << cusName << endl;
    cout << "잔 액: " << balance << endl << endl;
}

void Account::DepositMoney(int amount) // virtual
{
    // 0 미만 값 입력시 예외 발생
    if(amount < 0) throw NotAllowedInputException(amount);
    balance += amount;
}

int Account::WithDrawMoney(int amount)
{
    if(amount < 0) throw NotAllowedInputException(amount);
    // 입금 금액보다 큰 금액 출금 시도 시 예외 발생
    if(balance < amount) throw NotEnoughBalanceException(balance, amount);

    balance -= amount;
    return balance;
}

 

NormalAccount.h 

/*
 * 예외 발생
 */

#ifndef __NORMAL_ACCOUNT_H__
#define  __NORMAL_ACCOUNT_H__

#include "Account.h"

class NormalAccount : public Account
{
private:
    int interest;
public:
    NormalAccount(int _accID, int _balance, String _cusName, int _interest)
            : Account(_accID, _balance, _cusName), interest(_interest) {}

    virtual void DepositMoney(int amount)
    {
        if(amount < 0) throw NotAllowedInputException(amount);
        Account::DepositMoney(amount + (int)(amount * (interest/100.0)));
    }
};


#endif //  __NORMAL_ACCOUNT_H__

 

HighCreditAccount.h 

/*
 * 예외 추가
 */
#ifndef __HIGH_CREDIT_ACCOUNT_H__
#define __HIGH_CREDIT_ACCOUNT_H__

#include "NormalAccount.h"

class HighCreditAccount : public NormalAccount
{
private:
    int rating; // 신용등급
public:
    HighCreditAccount(int _accID, int _balance, String _cusName, int _interest, int _rating)
            : NormalAccount(_accID, _balance, _cusName, _interest), rating(_rating) {}

    virtual void DepositMoney(int amount)
    {
        if(amount < 0) throw NotAllowedInputException(amount); //
        int additional_interest;
        switch(this->rating)
        {
            case A_RATING:
                additional_interest = (int)(amount * (7/100.0)); break;
            case B_RATING:
                additional_interest = (int)(amount * (4/100.0)); break;
            case C_RATING:
                additional_interest = (int)(amount * (2/100.0)); break;
        }
        NormalAccount::DepositMoney(amount); // 원금 + 이자
        Account::DepositMoney(additional_interest);
    }
};


#endif // __HIGH_CREDIT_ACCOUNT_H__

 

AccountHandler.cpp

/*
 * 예외 발생
 */

#include "BankingCommon.h"
#include "Account.h"
#include "ExceptionClass.h"

Account::Account(int _accID, int _balance, String _cusName)
        : accID(_accID), balance(_balance)
{
    cusName = _cusName;
}

int Account::Get_accID() const { return accID; }

void Account::ShowAccInfo() const
{
    cout << "계좌ID: " << accID << endl;
    cout << "이 름: " << cusName << endl;
    cout << "잔 액: " << balance << endl << endl;
}

void Account::DepositMoney(int amount) // virtual
{
    // 0 미만 값 입력시 예외 발생
    if(amount < 0) throw NotAllowedInputException(amount);
    balance += amount;
}

int Account::WithDrawMoney(int amount)
{
    if(amount < 0) throw NotAllowedInputException(amount);
    // 입금 금액보다 큰 금액 출금 시도 시 예외 발생
    if(balance < amount) throw NotEnoughBalanceException(balance, amount);

    balance -= amount;
    return balance;
}