Esempio n. 1
0
        /// <summary>
        /// The entry point of the program
        /// </summary>
        /// <param name="args"></param>
        public static void Main(string[] args)
        {
            IHashFunction hashFunction;
            HashTable hashTable;
            Console.WriteLine("Enter:\n 1 to use first hash function\n 2 to use second hash function");
            uint enter = Convert.ToUInt16(Console.ReadLine());

            while (enter != 1 && enter != 2)
            {
                Console.WriteLine("Enter the correct number!");
                enter = Convert.ToUInt16(Console.ReadLine());
            }

            if (enter == 1)
            {
                hashFunction = new HashFunction1();
            }
            else
            {
                hashFunction = new HashFunction2();
            }

            int size = 5;
            hashTable = new HashTable(size, hashFunction);
            hashTable.Add(5);
            hashTable.Add(6);
            hashTable.Add(7);
            hashTable.Add(8);
            hashTable.Add(9);
            hashTable.Add(12);
            hashTable.Add(17);
            if (hashTable.Check(7))
            {
                Console.WriteLine("The element is found");
            }
            else
            {
                Console.WriteLine("The element not found");
            }

            hashTable.Remove(12);
            if (hashTable.Check(12))
            {
                Console.WriteLine("The element is found");
            }
            else
            {
                Console.WriteLine("The element not found");
            }

            if (hashTable.Check(17))
            {
                Console.WriteLine("The element is found");
            }
            else
            {
                Console.WriteLine("The element not found");
            }
        }
Esempio n. 2
0
        /// <summary>
        /// The entry point of the program
        /// </summary>
        /// <param name="args"></param>
        public static void Main(string[] args)
        {
            int size = 5;
            HashTable hashTable = new HashTable(size);
            hashTable.Add(5);
            hashTable.Add(6);
            hashTable.Add(7);
            hashTable.Add(8);
            hashTable.Add(9);
            hashTable.Add(12);
            hashTable.Add(17);
            if (hashTable.Check(7))
            {
                Console.WriteLine("The element is found");
            }
            else
            {
                Console.WriteLine("The element not found");
            }

            hashTable.Remove(12);
            if(hashTable.Check(12))
            {
                Console.WriteLine("The element is found");
            }
            else
            {
                Console.WriteLine("The element not found");
            }

            if (hashTable.Check(17))
            {
                Console.WriteLine("The element is found");
            }
            else
            {
                Console.WriteLine("The element not found");
            }
        }
        private void UpdateHashTable()
        {
            double maxLoadFactor = 0.7;

            if (loadFactor >= maxLoadFactor)
            {
                int updateSizeFactor = 2;

                var newHashTable = new HashTable(size * updateSizeFactor);

                for (int i = 0; i < size; ++i)
                {
                    for (int j = 1; j <= buckets[i].Size; ++j)
                    {
                        newHashTable.Add(buckets[i].Get(j).answer);
                    }
                }

                buckets         = newHashTable.buckets;
                size            = newHashTable.size;
                notEmptyBuckets = newHashTable.notEmptyBuckets;
                loadFactor      = newHashTable.loadFactor;
            }
        }
Esempio n. 4
0
 public void Initialize()
 {
     hashTable = new HashTable(5);
 }