Sasso Carta Forbice

moracinese.cpp

#include <string>
#include <vector>
#include <algorithm>

const std::vector<std::string> states = {"scissors","paper","rock"};

inline auto pick_up(const std::string& name)
{
		return distance(states.begin(), find(states.begin(), states.end(), name));
}

std::string rps(const std::string& p1, const std::string& p2)
{
		auto first = pick_up(p1);
    auto second = pick_up(p2);
    auto delta = second - first;
    // Win the first
    if (delta == 1 || delta == -2) {
    		return "Player 1 won!";
    } else if (delta == 0) {
    		return "Draw!";
    } else {
    		return "Player 2 won!";
    }
}