C++ 重载左移运算符

#include<iostream>
using namespace std;

class Complex
{
public:
	friend ostream& operator<<(ostream &out, Complex &c);
	Complex(int a=0, int b=0)
	{
		this->a = a;
		this->b = b;
	}
private:
	int a;
	int b;
};
ostream& operator<<(ostream &out, Complex &c)
{
	out << "12345 生活真是苦"<<endl;
	out << c.a << "+" << c.b << "i";
	return out;
}
void main()
{
	Complex c1(1,1);
	Complex c2(2,2);
	 
	cout << c1<<"12345 上山打老虎";
	system("pause");
}