此题错在哪里？

#include <iostream>
using namespace std;
class Point {
    private:
        int x;
        int y;
    public:
        Point() { };
、/*friend ostream & operator << (ostream & o,const Point & s);
    friend istream & operator >> (istream & is,const Point & s);
     
    ostream & operator <<(ostream & o,const Point & s)
    {
         o<<s.x<<s.y;
        return o;
    }
     
    istream & operator >> (istream & is,const Point & s)
    {
         is >>s.x>>s.y;
        return is;
    }
    注释部分是我修改部分，您看错在哪里？
     */
};
int main()
{
     Point p;
     while(cin >> p) {
         cout << p << endl;
    }
    return 0;
}
错误提示说 ostream & operator <<(ostream & o,const Point & s)只能有一个参数？