Example of using set with custom class

set_with_custom_class.cpp

#include <iostream>
#include <set>

using namespace std;

class MyClass{
public:
	MyClass (int _x, int _y):x(_x),y(_y){}
	bool operator<(const MyClass& rhs) const {
		return this->x < rhs.x ? true : (this->y < rhs.y ? true : false);
	}

private:
	int x;
	int y;
};

int main(int argc, const char *argv[])
{
	set<int> s1;
	set<MyClass> s2;

	for(int i = 0; i < 10; i++){
		s1.insert(i);
		s2.insert(MyClass(i,10));
	}
	return 0;
}