cgeneric.h

虚函数

#ifndef CGENERIC_H
#define CGENERIC_H

#include <iosfwd>
using namespace std;

class CGeneric
{
	friend ostream &operator<<(ostream &stream,CGeneric const &loan);
public:
	CGeneric(double,int,double);
	virtual ~CGeneric() {}
	virtual double getMonthlyPayment() const;
protected:
	double principal;
	int length;
	double const rate;
};

#endif CGENERIC_H