1.流重载 istream ostream

1.class

class MM {friend ostream& operator<<(ostream& out, MM& mm);friend istream& operator>>(istream& in, MM& mm);
public:MM() {}MM(int age,string name):age(age),name(name) {}
private:int age;string name;
};

2.实现函数

ostream& operator<<(ostream& out, MM& mm) {out << mm.age << "岁的" << mm.name << "喜欢我" << endl;return out;
}
istream& operator>>(istream& in, MM& mm) {in >> mm.age >> mm.name;return in;
}

3.main

int main() {//输出流MM mm(23, "王");MM mm1(18, "女神");cout << mm <<mm1<< endl;//输入流MM mm2, mm3;cin >> mm2 >> mm3;cout << mm2 << mm3;return 0;
}

结果：

2. 重载的一些基础知识