C++ 코딩 - 이자 계산 - 이자가 0으로 나와요

코드한건데 이자가 추가가안되네요 ㅜㅜ

/연산자가  /100한걸 정수단위로 짤라서 그런가하고 더블자료형으로 소수로 이자해봣는데도 안되네요...

왜이자가안나올까요

잘못된 이유는 다음과 같습니다.

○ Virtual 함수 선언 / 사용에 대해서 다시 확인하세요. Virtual은 상속 하는 상위 클래스에 선언합니다. 

○ Int형 변수에 10/100을 넣으니 0이 되고, 이 때문에 이자 계산이 0이 됩니다. 

수정된 코드는 아래와 같습니다.

#include
#include

using namespace std;
const int NAME_LEN = 20;


void ShowMenu(void);//메뉴출력
void MakeAccount(void);//계좌생성
void InsertMoney(void);//입금
void ExtractMoney(void);//출금
void OutputInfo(void);//계좌정보출력

enum
{
    MAKE = 1,
    INSERT = 2,
    EXTRACT = 3,
    OUTPUT = 4,
    EXIT = 5
};

class Account
{
private:

    char*username;
    int userid;
    int usermoney;
public:
    Account(char*name, int id, int money)
        :userid(id), usermoney(money)
    {
        int len = strlen(name) + 1;
        username = new char[len];
        strcpy(username, name);
    }

    int getid() const
    {
        return userid;
    }

    virtual void deposit(int money)
    {
        usermoney += (money);
    }
    void withdraw(int money)
    {
        if (usermoney < money)
            cout << "잔액부족" << endl;
        else
            usermoney -= money;
    }
    void showinfo() const
    {
        cout << "성명: " << username << endl;
        cout << "계좌번호: " << userid << endl;
        cout << "잔액: " << usermoney << endl;
    }
    ~Account()
    {
        delete[]username;
    }
};

class NormalAccount : public Account
{
private:
    float userija;
public:
    NormalAccount(char*name, int id, int money, int ija)
        : Account(name, id, money), userija(ija)
    {
    }
    void deposit(int money)
    {
        Account::deposit(money);
        Account::deposit(money*(userija / 100));
    }
};
class HighCreditAccount : public NormalAccount
{
private:
    int userplusija;
public:
    HighCreditAccount(char*name, int id, int money, int ija, int plusija)
        :NormalAccount(name, id, money, ija)
    {}
    void deposit(int money)
    {
        NormalAccount::deposit(money);
        Account::deposit(money*(userplusija / 100));
    }
};
class Handler
{
private:
    Account*Arr[100];
    int accnum;


public:
    Handler() : accnum(0)
    {}
    void showMenu(void)
    {
        cout << "---------Menu----------" << endl;
        cout << "1.계좌개설" << endl;
        cout << "2.입 금" << endl;
        cout << "3.출금" << endl;
        cout << "4.계좌정보 전체 출력" << endl;
        cout << "5.프로그램 종료" << endl;
    }
    void MakeAccount()
    {
        int choice;
        cout << '[' << "계좌종류선택" << ']' << endl;
        cout << "1.보통계좌선택 2.신용계좌선택" << endl;
        cout << "입력:";
        cin >> choice;

        if (choice == 1)
            MakeNormalAccount();
        else
            MakeHighCreditAccount();

    }
    void MakeNormalAccount()
    {
        int id;
        char name[NAME_LEN];
        int money;
        int ija;

        cout << "[보통계좌개설]" << endl;
        cout << "이름을 입력하시오: "; cin >> name;
        cout << "계좌번호를 입력하시오: "; cin >> id;
        cout << "입금액을 입력하시오: "; cin >> money;
        cout << "기본 이자율:"; cin >> ija;
        cout << endl;
        Arr[accnum++] = new NormalAccount(name, id, money, ija);
    }

    void MakeHighCreditAccount()
    {
        int id;
        char name[NAME_LEN];
        int money;
        int ija;
        int choice;
        int plusija;

        cout << "[보통계좌개설]" << endl;
        cout << "이름을 입력하시오: "; cin >> name;
        cout << "계좌번호를 입력하시오: "; cin >> id;
        cout << "입금액을 입력하시오: "; cin >> money;
        cout << "기본 이자율:"; cin >> ija;
        cout << "신용등급[A(1),B(2),C(3)]"; cin >> choice;
        cout << endl;
        switch (choice)
        {
        case 1:
            plusija = 107;
            Arr[accnum++] = new HighCreditAccount(name, id, money, ija, plusija);
            break;
        case 2:
            plusija = 104;
            Arr[accnum++] = new HighCreditAccount(name, id, money, ija, plusija);
            break;
        case 3:
            plusija = 102;
            Arr[accnum++] = new HighCreditAccount(name, id, money, ija, plusija);
            break;
        default:
            cout << "잘못입력하셨습니다" << endl;
        }

    }
    void InsertMoney(void)
    {
        int id;
        int money;
        cout << "[입금]" << endl;
        cout << "계좌번호: "; cin >> id;
        cout << "입금액 : "; cin >> money;
        cout << endl;
        for (int i = 0; i < accnum; i++)
        {
            if (Arr[i]->getid() == id)
            {
                Arr[i]->deposit(money);
                cout << "입금완료" << endl;
                return;

            }
            else
                cout << "잘못입력" << endl;
        }
    }
    void ExtractMoney(void)
    {
        int id;
        int money;
        cout << "[출금]" << endl;
        cout << "계좌번호: "; cin >> id;
        cout << "출금액: "; cin >> money;
        for (int i = 0; i < accnum; i++)
        {
            if (Arr[i]->getid() == id)
            {
                Arr[i]->withdraw(money);
                cout << "출금완료" << endl;
                return;
            }
            else
                cout << "잘못입력" << endl;
        }
    }
    void OutputInfo(void)
    {
        int id;
        cout << "[계좌정보출력]" << endl;
        cout << "계좌번호입력 : "; cin >> id;
        for (int i = 0; i < accnum; i++)
        {
            if (Arr[i]->getid() == id)
            {
                Arr[i]->showinfo();
            }
        }
    }
};
int main(void)
{
    Handler bank;
    int choice;
    while (1)
    {

        bank.showMenu();
        cout << "선택: ";
        cin >> choice;

        switch (choice)
        {
        case MAKE:
            bank.MakeAccount();
            break;

        case INSERT:
            bank.InsertMoney();
            break;

        case EXTRACT:
            bank.ExtractMoney();
            break;

        case OUTPUT:
            bank.OutputInfo();
            break;
        case EXIT:
            return 0;

        default:
            cout << "잘못입력하셨습니다. ";
        }
    }

    return 0;

};