fraction.h

多态性实验

#include<iostream.h>
class fraction
{
public:
	int fz;
	int fm;
	fraction(){fz=0,fm=1;}
	fraction(int z,int m){fz=z,fm=m;}
	void print();
	friend fraction operator+(fraction a);
	friend fraction operator-(fraction a);
	friend fraction operator*(fraction t,fraction p);
    friend fraction operator/(fraction t,fraction p);
};