static void Main(string[] args)
{
    Console.WriteLine("transports 开始");

    //判断是否合法状态
    bool ValidEndState(int state) => state != 3 && !(state >= 6 && state <= 9) && state != 12;

    //判断人是否和羊在一起
    bool IsPeopleWithSheep(int state) => state / 2 % 2 == 0 && state < 8 || state / 2 % 2 == 1 && state >= 8;

    //判断人是否和狼在一起
    bool IsPeopleWithWolf(int state) => !(state >= 4 && state <= 11);

    //判断人是否和菜在一起
    bool IsPeopleWithGreens(int state) => state % 2 == 0 && state < 8 || state % 2 == 1 && state >= 8;

    //运输人和青菜
    int TransferPeopleWithGreens(int i) => i ^ 9;

    //运输人和羊
    int TransferPeopleWithSheep(int i) => i ^ 10;

    //运输人和狼
    int TransPeopleWithWolf(int i) => i ^ 12;

    //运输人和狼
    int TransPeople(int i) => i ^ 8;
    Transport transport1 = new Transport("人和菜", IsPeopleWithGreens, ValidEndState, TransferPeopleWithGreens);
    Transport transport2 = new Transport("人和羊", IsPeopleWithSheep, ValidEndState, TransferPeopleWithSheep);
    Transport transport3 = new Transport("人和狼", IsPeopleWithWolf, ValidEndState, TransPeopleWithWolf);
    Transport transport4 = new Transport("人", state => true, ValidEndState, TransPeople);
    List<Transport> transports = new List<Transport> {transport1, transport2, transport3, transport4};
    int tempState = 0;
    int EndState = 15;
    while (tempState != EndState)
    {
        foreach (var actionItem in transports)
        {
            tempState = actionItem.Transfer(tempState);
        }
    }

    Console.WriteLine("transports 结束");
    Console.ReadKey();
}

/// <summary>
/// 状态合法
/// </summary>
/// <param name="state"></param>
/// <returns></returns>
public bool IsVaild(int state)
{
    return state != 3 && !(state >= 6 && state <= 9) && state != 12;
}

/// <summary>
/// 人和羊在一起返回真
/// </summary>
/// <param name="state"></param>
/// <returns></returns>
public bool IsPeopleWithSheep(int state)
{
    return ((state / 2) % 2 == 0 && state < 8) || ((state / 2) % 2 == 1 && state >= 8);
}

/// <summary>
/// 人和菜在一起返回真
/// </summary>
/// <param name="state"></param>
/// <returns></returns>
public bool IsPeopleWithGreens(int state)
{
    return state % 2 == 0 && state < 8 || state % 2 == 1 && state >= 8;
}

/// <summary>
/// 人和狼在一起返回真
/// </summary>
/// <param name="state"></param>
/// <returns></returns>
public bool IsPeopleWithWolf(int state)
{
    return !(state >= 4 && state <= 11);
}

public void Move()
{
int state = 0, tempState;
int EndState = 15;
while (state != EndState)
{
    tempState = MovePerson(state);
    if (IsVaild(tempState))
    {
        state = tempState;
        Console.WriteLine(state > 8 ? "人独自一人从A岸到达B岸" : "人独自一人从B岸到达A岸");
    }

    if (IsPeopleWithSheep(state))
    {
        tempState = MovePersonWithSheep(state);
        if (IsVaild(tempState))
        {
            state = tempState;
            Console.WriteLine(state > 8 ? "人带羊从A岸到达B岸" : "人带羊从B岸到达A岸");
        }
    }

    if (IsPeopleWithWolf(state))
    {
        tempState = MovePersonWithWolf(state);
        if (IsVaild(tempState))
        {
            state = tempState;
            Console.WriteLine(state > 8 ? "人带狼从A岸到达B岸" : "人带狼从B岸到达A岸");
        }
    }

    if (IsPeopleWithGreens(state))
    {
        tempState = MovePersonWithGreens(state);
        if (IsVaild(tempState))
        {
            state = tempState;
            Console.WriteLine(state > 8 ? "人带菜从A岸到达B岸" : "人带菜从B岸到达A岸");
        }
    }
}
}