ArrayList集合-[习题]--C#

 

：向集合中添加10个元素，计算平均值，求最大、最小值。

            double sum = 0;
            list.AddRange(new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 });
            int Max, Min;
            Max = Min = (int)list[0];

            for (int i = 0; i < list.Count; i++)
            {
                    //最大值
                if(Max < (int)list[i])
                {
                    Max = (int)list[i + 1];
                }
                    //最小值
                else if (Min > (int)list[i])
                {
                    Min = (int)list[i];
                }
                else { }
                sum += Convert.ToDouble(list[i]);
            }
            for (int i = 0; i < list.Count; i++)
            {
                Console.Write(list[i] + " ");
            }
            Console.WriteLine("\nAvg = {0}",sum / list.Count);
            Console.WriteLine("Max = {0}", Max);
            Console.WriteLine("Min = {0}", Min);

 

 

：把10个随机数存储到集合中，且不重复

            Random rd = new Random();
            for (int i = 0; i < 10; i++)
            {
                int n = rd.Next(0, 10);
                if (!list.Contains(n))
                {
                    list.Add(n);
                }
            }
            for (int i = 0; i < list.Count; i++)
            {
                Console.WriteLine(list[i]);
            }

 

 

完成。