OJ：重载 << 运算符

Description

补足程序，使得下面程序输出的结果是：

****100

#include <iostream>
#include <string>
using namespace std;
// Your Code Here
string Print1()
{
	return "****";
}
int Print2()
{
	return 100;
}

int main()
{
	cout << Print1 << Print2 << endl;
	return 0;
}

Output

****100

解法如下：

#include <iostream>
#include <string>
using namespace std;

ostream& operator<<(ostream& out, string (*p)())
{
	out << (*p)();
	return out;
}

ostream& operator<<(ostream& out, int (*p)())
{
	out << (*p)();
	return out;
}

string Print1()
{
	return "****";
}
int Print2()
{
	return 100;
}

int main()
{
	cout << Print1 << Print2 << endl;
	return 0;
}