Naked Statistics. Monty Hall. C#

 
// Dors generators: one with car and many with goat
int[] getDoors(int doorsCount){

    int[] d = new int[doorsCount];

    Random rnd = new Random();
    int carIndex = rnd.Next(0, doorsCount);

    d[carIndex] = 1;
    for(int i = 0; i < doorsCount; i++)
        if(carIndex != i)
            d[i] = 0;

    return d;

}

// Prepare data
Random rnd = new Random();
double winCounterNoChange = 0;
double winCounterChange = 0;

// Key attributes [!]
double rounds = 2;
int doorsCount = 100;

// Do many games
for (int i = 0; i < rounds; i++)
{

    // Next random doors & my random choose
    int[] d = getDoors(doorsCount);
    int myDoor = rnd.Next(0, doorsCount);

    // No change if my choose is right
    if (d[myDoor] == 1)
        winCounterNoChange++;

    // I do change, only two possible results:
    // I have door with car - I'll lose
    // I have door with goat - I'll win
    // Counting if it's win
    if(d[myDoor] != 1)
        winCounterChange++;

}

// Count and probability of the victory
Console.Clear();

Console.WriteLine($"Doors = {doorsCount}, total games' rounds = {rounds}");

string R1 = $@"Player don't change the door: {winCounterNoChange} " +
$@"wins = {(winCounterNoChange / rounds) * 100}%";

string R2 = $@"Player change the door: {winCounterChange} " +
$@"wins = {(winCounterChange / rounds) * 100}%";

Console.WriteLine(R1);
Console.WriteLine(R2);
Console.ReadKey();