sample_shanten_number_calculation.cpp

#include <iostream>

#include "mahjong/mahjong.hpp"

int main(int argc, char *argv[])
{
    using namespace mahjong;

    // Create hand by mpsz notation or vector of tiles.
    Hand hand = from_mpsz("1m137p1268s135567z");
    // Hand hand = from_array({Tile::Manzu2, Tile::Manzu2, Tile::Manzu2, Tile::Manzu5,
    //                          Tile::Manzu6, Tile::Manzu7, Tile::Pinzu3, Tile::Pinzu4,
    //                          Tile::Souzu3, Tile::Souzu3, Tile::Souzu6, Tile::Souzu6,
    //                          Tile::Souzu7});
    // number of melds.
    int num_melds = 0;

    {
        // Calculate minimum shanten number of regular hand, Seven Pairs and Thirteen Orphans.
        const auto [shanten_type, shanten] =
            ShantenCalculator::calc(hand, num_melds, ShantenFlag::All);
        std::cout << "shanten type: ";
        for (int type : {ShantenFlag::Regular, ShantenFlag::SevenPairs,
                         ShantenFlag::ThirteenOrphans}) {
            if (shanten_type & type) {
                std::cout << ShantenFlag::Name.at(type) << " ";
            }
        }
        std::cout << std::endl;
        std::cout << "shanten: " << shanten << std::endl;
    }

    {
        // Calculate shanten number for regular hand (exclude Seven Pairs, Thirteen Orphans).
        const auto [shanten_type, shanten] =
            ShantenCalculator::calc(hand, num_melds, ShantenFlag::Regular);
        std::cout << "shanten type: " << ShantenFlag::Name.at(shanten_type)
                  << std::endl;
        std::cout << "shanten: " << shanten << std::endl;
    }

    {
        // Calculate shanten number for Seven Pairs (七対子).
        const auto [shanten_type, shanten] =
            ShantenCalculator::calc(hand, num_melds, ShantenFlag::SevenPairs);
        std::cout << "shanten type: " << ShantenFlag::Name.at(shanten_type)
                  << std::endl;
        std::cout << "shanten: " << shanten << std::endl;
    }

    {
        // Calculate shanten number for Thirteen Orphans (国士無双).
        const auto [shanten_type, shanten] =
            ShantenCalculator::calc(hand, num_melds, ShantenFlag::ThirteenOrphans);
        std::cout << "shanten type: " << ShantenFlag::Name.at(shanten_type)
                  << std::endl;
        std::cout << "shanten: " << shanten << std::endl;
    }
}