Inheritance Problem

[kdrewes]

Hi guys,

I'm having a problem which involves inheritance. I am trying to prompt the user to input dollars and then cents. Once they input the information I prompt the user to input when they would like to add a percentage or subtract a percent (interest) to the amount they initially inputted. So for example, if you input 2 dollars and 50 cents, and then you select to subtract an interest of 50% then the output should be 1 dollar and 25 cents. However, it continues to display the same balance as the amount that was initially inputted. Could someone please help me ? Thank you

   #include <iostream>
using namespace std;

class Account
{
private:
    int Dollars;
    int Cents;
public:
    // Constructor
    Account();
    Account(int, int);
    
    // Deposit -> balance(Mutator)
    void deposit(int, int);
    void SubtractDeposit(int,int);
    
    // Accessor
    const int getDollars() const;
    const int getCents() const;
};

Account::Account()
{
    Dollars = 0;
    Cents = 0.0;
    
}
Account::Account(int d, int c)
{
    Dollars = d;
    Cents = c;
    
}
void Account::deposit(int d, int c)
{
    Dollars += (c/100) + d;
    Cents = (c%100) + Cents;
    
}

void Account::SubtractDeposit(int d, int c)
{
    Dollars -= d;
    Cents -= c;
    
}

const int Account::getDollars() const
{
    return Dollars;
}

const int Account::getCents() const
{
    return Cents;
}

class SavingsAccount: public Account
{
private:
    int DollarInterest;
    int CentInterest;
public:
    // Constructor
    SavingsAccount();
    SavingsAccount(int,int);
    // Mutator
    void addInterest(int,int);
    void SubtractInterest(int,int);
    const int GetDollarInterest() const;
    const int GetCentInterest() const;
};

SavingsAccount::SavingsAccount()
{
    DollarInterest = 0;
    CentInterest = 0;
    
    
}

SavingsAccount::SavingsAccount(int DI, int CI)
{
    DollarInterest = DI;
    CentInterest = CI;
    
}

void SavingsAccount::addInterest(int d, int c)
{
   
    DollarInterest = getDollars() * (d/100);
    CentInterest = getCents() * (c/100);
    deposit(DollarInterest, CentInterest);
    
}

void SavingsAccount::SubtractInterest(int d, int c)
{
    
    DollarInterest = getDollars() * (d/100);
    CentInterest = getCents() * (c/100);
    SubtractDeposit(DollarInterest, CentInterest);
    
}


int main()
{
    int Dollarz;
    int Cents;
    int DollarInterest;
    int CentInterest;
    int Select;
    
    
    
    cout << "Input Dollars: $";
    cin >> Dollarz;
    cout << endl;
    
    
    cout << "Input Cents: ¢";
    cin >> Cents;
    cout << endl;
    
    SavingsAccount myAccount;
    
    
    myAccount.deposit (Dollarz,Cents);
    
    
    cout << "Current Amount of Dollars: $" << myAccount.getDollars() << endl;
    cout << "Current Amount of Cents: ¢" << myAccount.getCents() << endl;
    
    cout << endl << endl;
    
    cout << "Menu: \n";
    cout << "==========;\n\n";
    cout << "1) Add Interest: \n";
    cout << "2) Subtract Interest: \n";
    cin >> Select;
    
    cout << endl << endl;
    
    while (Select <= 0 || Select > 2)
    {
        cout <<"Invalid entry, please re-enter: ";
        cin >> Select;
    }
    
    cout << endl;
    
    if (Select == 1)
    {
        cout << "Input how much interest you would like to add: %";
        cin >> DollarInterest;
        
        CentInterest=DollarInterest;
        
        cout << endl;
        
        myAccount.addInterest(DollarInterest,CentInterest);
        
        cout << "You added %" << DollarInterest << " of interest. ";
        
        cout << endl << endl;
        
        cout << "Current Amount of dollars with interest: $" << myAccount.getDollars() << endl;
        cout << "Current Amount of cents with interest: ¢" << myAccount.getCents() << endl;
    }
    
    cout << endl;
    
    if (Select == 2)
    {
        cout << "Input how much interest you would like to subtract: %";
        cin >> DollarInterest;
        
        CentInterest=DollarInterest;
        
        cout << endl;
        
        myAccount.SubtractInterest(DollarInterest,CentInterest);
        
        cout << "You added %" << DollarInterest << " of interest. ";
        
        cout << endl << endl;
        
        cout << "Current Amount of dollars subtracted after interest: $" << myAccount.getDollars() << endl;
        cout << "Current Amount of cents subtracted after interest: $" << myAccount.getCents() << endl;
        
        
    }
    
    
    
    return 0;
}

[TheIdeasMan]

Hi,

You have integer division: 50/100 = 0


If you use a debugger you can deduce how this problem happens. Hopefully there is a GUI debugger in your IDE. Set up a watch list of variables, walk the code 1 line at a time, see how the values change.

Good Luck !!

[kdrewes]

Hi IdeasMan,

Sorry for the late reply. I will definitely give that try and see how it works! I have xcode which probably isn't the best IDE to have but if necessary i will download a more efficient one. Thank you so much for your help!