输出运算符重载格式

ostream & operator<<(ostream &out,person a)
{cout << a.a << endl;return out;
}

举例输出运算符重载

#include "iostream"using namespace std;class person
{public:person(int a):a(a){}int a;
};ostream & operator<<(ostream &out,person a)
{cout << a.a << endl;return out;
}int main()
{person a(10);person b(99);cout << a << b  ;
}

输入运算符重载格式

istream  & operator>>(istream &in,person &a)
{cin>>a.a;return in;
}

举例输入运算符重载

#include "iostream"using namespace std;class person
{public:person(int a):a(a){}int a;
};ostream & operator<<(ostream &out,person a)
{cout << a.a << endl;return out;
}istream  & operator>>(istream &in,person &a)
{cin>>a.a;return in;
}int main()
{person a(10);person b(99);cout << a << b;cin>>a>>b;cout << a << b;
}