【c++程序】关于operator

/********************************************************/
/**************---About   符号的重载-------**************/
/**************---Author: Tibruce Zhao-----**************/
/**************---Date:   2015/10/18------***************/
/********************************************************/

#include<iostream>
using namespace std;

class F
{
int n;
int d;
public:
F(int n=0,int d=1):n(n),d(d){}
void print(bool newline=true);
void input();
int getn() const {return n;}
int getd() const {return d;}
friend istream& operator>>(istream& in,F& f);//有元，可以访问私有成员
};
//void operator>>(istream &in,int& n){}
istream& operator>>(istream& in,F& f)
{
char c;
in>>f.n>>c>>f.d;
return in;
}
ostream& operator<<(ostream& out,const F& f)
{
out<<"分子"<<f.getn()<<'/'<<"分母"<<f.getd();
return out;
}
int main()
{
F a,b;
int n;
cin>>a>>b;		//cin.operator>>(a);    operator>>(cin,a)
//cin>>n;   //operator>>(int& __n); operator>>(cin,n)
cout<<a<<b;    //cout.operator<<(a);   operator(cout,a);
return 0;
}