C++ Chapter 01. C언어 기반의 C++. 01-6 OOP 단계별 프로젝트 01 단계

/*
 * Banking System Ver 0.1
 * 작성자: 윤성우
 * 내  용: OOP 단계별 프로젝트의 기본 틀 구성
 */
 
#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};
 
typedef struct 
{
    int accID;      // 계좌번호
    int balance;    // 잔    액
    char cusName[NAME_LEN];   // 고객이름
} Account;
 
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;
        }
    }
    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].accID=id;
    accArr[accNum].balance=balance;
    strcpy(accArr[accNum].cusName, name);
    accNum++;
}
 
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].accID==id)
        {
            accArr[i].balance+=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].accID==id)
        {
            if(accArr[i].balance<money)
            {
                cout<<"잔액부족"<<endl<<endl;
                return;
            }
 
            accArr[i].balance-=money;
            cout<<"출금완료"<<endl<<endl;
            return;
        }
    }
    cout<<"유효하지 않은 ID 입니다."<<endl<<endl;
}
 
void ShowAllAccInfo(void)    
{
    for(int i=0; i<accNum; i++)
    {
        cout<<"계좌ID: "<<accArr[i].accID<<endl;
        cout<<"이  름: "<<accArr[i].cusName<<endl;
        cout<<"잔  액: "<<accArr[i].balance<<endl<<endl;
    }
}