(열혈 C++ 프로그래밍) OOP 단계별 프로젝트 03단계

 

 

 

 

 

 

 

 

#include <iostream>
#include <cstring>

using namespace std;
const int NAME_LEN=20;

void ShowMenu(void);       // 메뉴출력
void MakeAccount(void);    // 계좌개설을 위한 함수
void DepositMoney(void);       // 입    금
void WithdrawMoney(void);      // 출    금
void ShowAllAccInfo(void);     // 잔액조회

enum {MAKE=1, DEPOSIT, WITHDRAW, INQUIRE, EXIT};

class Account
{
private:
	int accID;      // 계좌번호
	int balance;    // 잔    액
	char * cusName;   // 고객이름

public:
	Account(int ID, int money, char * name)
		: accID(ID), balance(money)
	{
		cusName=new char[strlen(name)+1];
		strcpy(cusName, name);
	}

	Account(const Account & ref)
		: accID(ref.accID), balance(ref.balance)
	{
		cusName=new char[strlen(ref.cusName)+1];
		strcpy(cusName, ref.cusName);
	}

	int GetAccID() { return accID; }

	void Deposit(int money)
	{
		balance+=money;
	}

	int Withdraw(int money)    // 출금액 반환, 부족 시 0
	{
		if(balance<money)
			return 0;
		
		balance-=money;
		return money;
	}

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

	~Account()
	{
		delete []cusName;
	}	
};

Account * accArr[100];   // Account 저장을 위한 배열
int accNum=0;        // 저장된 Account 수

int main(void)
{
	int choice;
	
	while(1)
	{
		ShowMenu();
		cout<<"선택: "; 
		cin>>choice;
		cout<<endl;
		
		switch(choice)
		{
		case MAKE:
			MakeAccount(); 
			break;
		case DEPOSIT:
			DepositMoney(); 
			break;
		case WITHDRAW: 
			WithdrawMoney(); 
			break;
		case INQUIRE:
			ShowAllAccInfo(); 
			break;
		case EXIT:
			return 0;
		default:
			cout<<"Illegal selection.."<<endl;
		}
	}

	for(int i=0; i<accNum; i++)
		delete accArr[i];
	return 0;
}

void ShowMenu(void)
{
	cout<<"-----Menu------"<<endl;
	cout<<"1. 계좌개설"<<endl;
	cout<<"2. 입    금"<<endl;
	cout<<"3. 출    금"<<endl;
	cout<<"4. 계좌정보 전체 출력"<<endl;
	cout<<"5. 프로그램 종료"<<endl;
}

void MakeAccount(void) 
{
	int id;
	char name[NAME_LEN];
	int balance;
	
	cout<<"[계좌개설]"<<endl;
	cout<<"계좌ID: ";	cin>>id;
	cout<<"이  름: ";	cin>>name;
	cout<<"입금액: ";	cin>>balance;
	cout<<endl;

	accArr[accNum++]=new Account(id, balance, name);
}

void DepositMoney(void)
{
	int money;
	int id;
	cout<<"[입    금]"<<endl;
	cout<<"계좌ID: ";	cin>>id;
	cout<<"입금액: ";	cin>>money;
	
	for(int i=0; i<accNum; i++)
	{
		if(accArr[i]->GetAccID()==id)
		{
			accArr[i]->Deposit(money);
			cout<<"입금완료"<<endl<<endl;
			return;
		}
	}
	cout<<"유효하지 않은 ID 입니다."<<endl<<endl;
}

void WithdrawMoney(void)
{
	int money;
	int id;
	cout<<"[출    금]"<<endl;
	cout<<"계좌ID: ";	cin>>id;
	cout<<"출금액: ";	cin>>money;
	
	for(int i=0; i<accNum; i++)
	{
		if(accArr[i]->GetAccID()==id)
		{
			if(accArr[i]->Withdraw(money)==0)
			{
				cout<<"잔액부족"<<endl<<endl;
				return;
			}

			cout<<"출금완료"<<endl<<endl;
			return;
		}
	}
	cout<<"유효하지 않은 ID 입니다."<<endl<<endl;
}

void ShowAllAccInfo(void)	
{
	for(int i=0; i<accNum; i++)
	{
		accArr[i]->ShowAccInfo();
		cout<<endl;
	}
}