High Score with Dictionary Example

using System.IO; using System; using System.Collections.Generic; class ScoreData { public Dictionary<int, int> highScores = new Dictionary<int, int>(); public bool AddScore(int level, int score) /*Add the score to the dictionary, under these conditions: - If the dictionary also has a key for the given level, only add the score if it's greater than the currently stored score. - If the dictionary does not contain a key for the level, add the score as a new key-value pair, but only if the score is greater than 0 Word of caution: Calling the Add() function on a key that is already in the dictionary will result in an error, so that's why we check to see if the dictionary contains the key with the ContainsKey function first. */ { if(highScores.ContainsKey(level) && score > 0) { if(score > highScores[level]) { //If there is already a score stored for this level, rather than using Add(), we can just change the stored value with this bracket notation. highScores[level] = score; return true; } } else { if(score > 0) { highScores.Add(level, score); return true; } } return false; } public int GetScore(int level) /* If the dictionary has a key-value pair for the level, we retrieve and return the score. Otherwise return -1. You can decide how to handle a -1 return value based on your needs. */ { if(highScores.ContainsKey(level)) { return highScores[level]; } else { return -1; } } } class Program { static void Main() { ScoreData data = new ScoreData(); data.AddScore(1, 20); data.AddScore(2, 35); data.AddScore(2, 50); Console.WriteLine("Level 1 Score: " + data.GetScore(1)); Console.WriteLine("Level 2 Score: " + data.GetScore(2)); Console.WriteLine("Level 3 Score: " + data.GetScore(3)); } }