pragma solidity ^0.4.0;

library GreeterLib {
	struct Greeting {
		bytes32 greeting;
		uint count;
		address[] greeted;
	}

	function greet(Greeting storage self, address who) public returns (bytes32) {
		self.count += 1;
		self.greeted.push(who);
		return self.greeting;
	}
}

contract GreeterSimple {
	GreeterLib.Greeting greeting;

	function GreeterSimple(bytes32 _greeting) {
		greeting.greeting = _greeting;
	}

	function greet() public returns (bytes32) {
		return GreeterLib.greet(greeting, msg.sender);
	}
}