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。

 1             double sum = 0;

 2             list.AddRange(new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 });

 3             int Max, Min;

 4             Max = Min = (int)list[0];

 5 

 6             for (int i = 0; i < list.Count; i++)

 7             {

 8                     //最大值

 9                 if(Max < (int)list[i])

10                 {

11                     Max = (int)list[i + 1];

12                 }

13                     //最小值

14                 else if (Min > (int)list[i])

15                 {

16                     Min = (int)list[i];

17                 }

18                 else { }

19                 sum += Convert.ToDouble(list[i]);

20             }

21             for (int i = 0; i < list.Count; i++)

22             {

23                 Console.Write(list[i] + " ");

24             }

25             Console.WriteLine("\nAvg = {0}",sum / list.Count);

26             Console.WriteLine("Max = {0}", Max);

27             Console.WriteLine("Min = {0}", Min);

 

 

：把10个随机数存储到集合中，且不重复

 1             Random rd = new Random();

 2             for (int i = 0; i < 10; i++)

 3             {

 4                 int n = rd.Next(0, 10);

 5                 if (!list.Contains(n))

 6                 {

 7                     list.Add(n);

 8                 }

 9             }

10             for (int i = 0; i < list.Count; i++)

11             {

12                 Console.WriteLine(list[i]);

13             }

 

 

完成。