Distributing points (integers) in C#

Question

Basically I am trying to make a points system, everything is done except from distributing points.

For example, I have an array that stores the points (Key is the players ID):

array[0] = 0
array[1] = 0
array[2] = 3
array[3] = 3
array[4] = 5

So from this I have to go to the following points system: 5 for 1st 4 for 2nd 3 for 3rd 2 for 4th 1 for 5th

Now if your tied second, like in the example, both players get 4 points and the last 2 players get 2 points because they are tied 4th, but I need the possibility of the following example working as well:

array[0] = 1
array[1] = 2
array[2] = 3
array[3] = 4
array[4] = 5

Evenly distributed points, which can also convert to the other points system, now this is dynamic, there could be 10 players, in which case the points system goes like the following:

10 for 1st 9 for 2nd 8 for 3rd 7 for 4th 6 for 5th

and so forth.

Any help would be much appreciated.

I dont understand. Was there a code-related question in there? — Sam Axe, Jan 28 '13 at 03:30
@Dan-o I think he is just asking for a way to award each player based on their ranks. — swtdrgn, Jan 28 '13 at 03:38
Yes, I do not know how I would it be possible to distribute the points evenly. — Daniel McAssey, Jan 28 '13 at 03:38
I would imagine it being as simple as doing something like the following, for example if you were going to set player #1's score: `array[1] += (totalAmountOfPlayers - finishingPlace) + 1;`. Thus, if there were 15 players total and player #1 got 3rd place, it would award him (15 - 3) + 1 = 13 points. — Ichabod Clay, Jan 28 '13 at 04:01
The problem I am having is getting the finishing place, for the first example that I posted. — Daniel McAssey, Jan 28 '13 at 04:05
Strike that, I was thinking it was a type of race. I understand where you're coming from now :p — Ichabod Clay, Jan 28 '13 at 04:07

Ichabod Clay · Accepted Answer · 2013-01-28T05:01:22.967

Something like this should be what you are looking for. Keep in mind it isn't exactly optimized considering I was writing it down as my brain thought of it.

We can start out by having our array of scores (as per the example provided):

int[] scores = { 0, 0, 3, 3, 5 };

Next, we can put the data into a different form so that it will be easier to sort:

Dictionary<int, int> playerScorePair = new Dictionary<int, int>();

//Loop through scores[] and add each player # and score to the Dictionary.
for (int i = 0; i < scores.Length; i++)
    playerScorePair.Add(i, scores[i]);

playerScorePair = playerScorePair.OrderByDescending(psp => psp.Value)
                                 .ToDictionary(psp => psp.Key, psp => psp.Value);

This sorts the dictionary in descending order based on the scores of each player. After that, we can find out what place each player came in:

int previousScore = -1, counter = 1, place = 1; //A few starting variables.
int totalPlayers = playerScorePair.Count;
int[] endScores = new int[scores.Length]; //This endScores[] array will hold the final scores for each player based on the place they finished in.

foreach (KeyValuePair<int, int> kvp in playerScorePair)
{
    //If the previous score is not equal to the current score, then we can
    // increment the current place. For example, if players 1-2-3 had scores of
    // 10-10-5 respectively, players 1 and 2 would be in first, but player 3 would be
    // equal to "counter", which would be the 3rd iteration, thus 3rd place.
    if (previousScore != kvp.Value && previousScore != -1)
        place = counter;

    endScores[kvp.Key] = (totalPlayers - place) + 1;
    previousScore = kvp.Value;
    counter++;
}

endScores will now contain all the scores for each player based on the place that they came in. For example, player #2 would be endScores[2] which would be equal to 4.

score 0 · Answer 2 · answered Jan 28 '13 at 04:46

Solved this using the following code:

        int maxPointGiven = scoreManager.numPlayers;

        int previousScore = 0;
        int previousPosition = 0;
        int previousPoints = 0;
        int countGiven = 0;
        bool newCount = true;

        for (int i = (scoreList.Count - 1); i >= 0; i--)
        {
            if (newCount == true)
            {
                previousPosition = i + 1;
                previousScore = scoreList[i].Value;
                previousPoints = maxPointGiven;
                newCount = false;
            }

            if (scoreList[i].Value == previousScore)
            {
                int oldPoints = int.Parse(dgvPlayers.Rows[scoreList[i].Key].Cells[2].Value.ToString());
                dgvPlayers.Rows[scoreList[i].Key].Cells[2].Value = previousPoints + oldPoints;
                countGiven += 1;
            }
            else
            {
                int oldPoints = int.Parse(dgvPlayers.Rows[scoreList[i].Key].Cells[2].Value.ToString());
                previousPosition = i + 1;
                previousScore = scoreList[i].Value;
                previousPoints = maxPointGiven - countGiven;
                dgvPlayers.Rows[scoreList[i].Key].Cells[2].Value = previousPoints + oldPoints;
                countGiven += 1;
            }
        }

Distributing points (integers) in C#

2 Answers2