undefined reference to `vtable for - C++ - Ответ 4538629

class BrassPlus : public AcctABC
{
private:
    double maxLoan;
    double rate;
    double owesBank;
public:
    BrassPlus(const char *s = "Nullbody", long an = -1,
              double bal = 0.0, double ml = 500,
              double r = 0.10);
    BrassPlus(const Brass &ba, double ml = 500, double r = 0.1);
    virtual void ViewAcct() const;
    virtual void Withdraw(double amt);
    void ResetMax(double m) {maxLoan = m;};
    void ResetRate(double r) {rate = r;};
    void ResetOwes() {owesBank = 0;};
};

class AcctABC
{
private:
    enum {MAX = 35};
    char fullName[MAX];
    long acctNum;
    double balance;
protected:
    const char * FullName() const {return fullName;}
    long AcctNum() const {return acctNum;}
public:
    AcctABC(const char *s = "Nullbody", long an = -1, double bal = 0.0);
    void Deposit(double amt);
    virtual void Withdraw(double amt) = 0;
    double Balance() const {return balance;}
    virtual void ViewAcct() const = 0;
    virtual ~AcctABC() {};
};

AcctABC::AcctABC(const char *s, long an, double bal)
{
    std::strncpy(fullName, s, MAX - 1);
    fullName[MAX-1] = '\0';
    acctNum = an;
    balance = bal;
}
 
BrassPlus::BrassPlus(const char *s, long an, double bal, double ml, double r) : AcctABC(s,an,bal)
{
    maxLoan = ml;
    owesBank = 0.0;
    rate = r;
}