Task: Snake and ladder


C++: #include <iostream>
#include <map>
#include <random>

std::default_random_engine generator;
std::uniform_int_distribution<int> dice(1, 6);
int rollDice() {
    return dice(generator);
}

const bool sixesThrowAgain = true;
const std::map<int, int> snl{
    {4, 14},
    {9, 31},
    {17, 7},
    {20, 38},
    {28, 84},
    {40, 59},
    {51, 67},
    {54, 34},
    {62, 19},
    {63, 81},
    {64, 60},
    {71, 91},
    {87, 24},
    {93, 73},
    {95, 75},
    {99, 78},
};


template <template<class, class, class...> class C, typename K, typename V, typename... Args>
V GetWithDef(const C<K, V, Args...>& m, K const& key, const V & defval) {
    typename C<K, V, Args...>::const_iterator it = m.find(key);
    if (it == m.end())
        return defval;
    return it->second;
}

int turn(int player, int square) {
    while (true) {
        int roll = rollDice();
        printf("Player %d, on square %d, rolls a %d", player, square, roll);
        if (square + roll > 100) {
            printf(" but cannot move.\n");
        } else {
            square += roll;
            printf(" and moves to square %d\n", square);
            if (square == 100) return 100;
            int next = GetWithDef(snl, square, square);
            if (square < next) {
                printf("Yay! Landed on a ladder. Climb up to %d.\n", next);
                square = next;
            } else if (next < square) {
                printf("Oops! landed on a snake. Slither down to %d.\n", next);
                square = next;
            }
        }
        if (roll < 6 || !sixesThrowAgain)return square;
        printf("Rolled a 6 so roll again.\n");
    }
}

int main() {
    
    int players[] = { 1, 1, 1 };

    while (true) {
        for (int i = 0; i < sizeof(players) / sizeof(int); ++i) {
            int ns = turn(i + 1, players[i]);
            if (ns == 100) {
                printf("Player %d wins!\n", i + 1);
                goto out;
            }
            players[i] = ns;
            printf("\n");
        }
    }

out:
    return 0;
}







VB: Module Module1

    ReadOnly SNL As New Dictionary(Of Integer, Integer) From {
        {4, 14},
        {9, 31},
        {17, 7},
        {20, 38},
        {28, 84},
        {40, 59},
        {51, 67},
        {54, 34},
        {62, 19},
        {63, 81},
        {64, 60},
        {71, 91},
        {87, 24},
        {93, 73},
        {95, 75},
        {99, 78}
    }
    ReadOnly rand As New Random
    Const sixesThrowAgain = True

    Function Turn(player As Integer, square As Integer) As Integer
        Do
            Dim roll = rand.Next(1, 6)
            Console.Write("Player {0}, on square {1}, rolls a {2}", player, square, roll)
            If square + roll > 100 Then
                Console.WriteLine(" but cannot move.")
            Else
                square += roll
                Console.WriteLine(" and moves to square {0}", square)
                If square = 100 Then
                    Return 100
                End If

                Dim nxt = square
                If SNL.ContainsKey(square) Then
                    nxt = SNL(nxt)
                End If
                If square < nxt Then
                    Console.WriteLine("Yay! Landed on a ladder. Climb up to {0}.", nxt)
                    If nxt = 100 Then
                        Return 100
                    End If
                    square = nxt
                ElseIf square > nxt Then
                    Console.WriteLine("Oops! Landed on a snake. Slither down to {0}.", nxt)
                    square = nxt
                End If
            End If

            If roll < 6 OrElse Not sixesThrowAgain Then
                Return square
            End If
            Console.WriteLine("Rolled a 6 so roll again.")
        Loop
    End Function

    Sub Main()
        Dim players = {1, 1, 1}
        Do
            For i = 1 To players.Length
                Dim ns = Turn(i, players(i - 1))
                If ns = 100 Then
                    Console.WriteLine("Player {0} wins!", i)
                    Return
                End If
                players(i - 1) = ns
                Console.WriteLine()
            Next
        Loop
    End Sub

End Module