iProduct.h

#ifndef IPRODUCT_H
#define IPRODUCT_H
#include <fstream>
#include <iostream>

namespace AMA {
class iProduct {
    private:
    virtual std::fstream &store(std::fstream &file, bool newLine = true) const = 0;
    virtual std::fstream &load(std::fstream &file) =0;
    virtual std::ostream &write(std::ostream &os, bool linear) const = 0;
    virtual std::istream &read(std::istream &is) = 0;
    virtual bool operator==(const char *) const = 0;
    virtual double total_cost() const = 0;
    virtual const char *name() const = 0;
    virtual void quantity(int) = 0;
    virtual int qtyNeeded() const = 0;
    virtual int quantity() const = 0;
    virtual int operator+=(int) = 0;
    virtual bool operator>(const iProduct &) const = 0;

    public:
    friend std::ostream & operator<<(std::ostream &, const iProduct &);
    friend std::istream &operator>>(std::istream &, iProduct &);
    friend double operator+=(double &, const iProduct &);
     
};
iProduct *CreateProduct();
iProduct *CreatePerishable();
}
#endif