Question

How to use friend operator in C++

Answer 1

#include <iostream>

using std::cout;
using std::endl;
using std::ostream;

class Test {
	char name[50];
	int age;
public:
	Test(char *_name, int _age)
	{
		strcpy(name, _name);
		age = _age;
	}
	friend ostream &operator<<(ostream &stream, Test o);
};
ostream &operator<<(ostream &stream, Test o)
{
	stream << o.name << " " << o.age << endl;

	return stream; 
}
int main()
{
	Test o1("Anakin Skywalker", 63);
	Test o2("Obi-Wan Kenobi", 90);

	cout << o1 << o2;

	return 0;
}


/*
run:

Anakin Skywalker 63
Obi-Wan Kenobi 90

*/

 

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