指定随机数的输出

指定随机数的输出

主程序入口：

 

namespace RandomNumber
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("采摘0-100之间不重复数：");
            Console.WriteLine();
            RandomSetOfNumber rdm = new RandomSetOfNumber(0, 100);
            string str = string.Empty;
            for (int i = 0; i < 100; i++)
            {
                str += rdm.Next().ToString() + " ";
            }
            Console.WriteLine(str);
            Console.WriteLine();
            Console.WriteLine();


            Console.WriteLine("采摘一组指定随机数( 1,9, 13, 50 and 99)：");
            Console.WriteLine();
            RandomSetOfNumber rdm1 = new RandomSetOfNumber();
            rdm1.SetOfNumbers.Add(1);
            rdm1.SetOfNumbers.Add(9);
            rdm1.SetOfNumbers.Add(13);
            rdm1.SetOfNumbers.Add(99);
            rdm1.SetOfNumbers.Add(50);
            string str1 = string.Empty;
            for (int i = 0; i < 5; i++)
            {
                str1 += rdm1.Next().ToString() + " ";
            }
            Console.WriteLine(str1);

            Console.ReadLine();
        }
    }
}

 

 

RandomSetOfNumber类：

namespace RandomNumber
{
    class RandomSetOfNumber
    {
        List<int> _setOfNumbers = new List<int>();

        public List<int> SetOfNumbers
        {
            get { return _setOfNumbers; }
            set { _setOfNumbers = value; }
        }
        Random _random = new Random();

        public RandomSetOfNumber()
        {

        }
        public RandomSetOfNumber(int min, int max)
        {
            for (int i = min; i <= max; i++)
            {
                _setOfNumbers.Add(i);
            }
        }

        public int Next()
        {
            if (_setOfNumbers.Count > 0)
            {
                int nextNumberIndex = _random.Next(_setOfNumbers.Count);
                int val = _setOfNumbers[nextNumberIndex];
                _setOfNumbers.RemoveAt(nextNumberIndex);
                return val;
            }
            return -1;

        }
    }
}