集合ArrayList习题练一练——分数

namespace 集合习题练一练
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("请输入你们班的人数:");
            int n = Convert.ToInt32(Console.ReadLine());
            ArrayList al = new ArrayList();
            for (int i = 0; i < n; i++)
            {
                Console.WriteLine("第"+(i+1)+"个同学的成绩为：");
                al.Add(Convert.ToInt32(Console.ReadLine()));
            }
            for (int i = 0; i < al.Count; i++)
            {
                Console.WriteLine("同学们的成绩依次为"+al[i]+"分");
            }
            double sum = 0;

            for (int i = 0; i < n; i++)
            {
                sum = sum + Convert.ToInt32(al[i]);
            }
            Console.WriteLine("总分为"+sum+"分");
            al.Sort();
            for (int i = 0; i < al.Count; i++)
            {
                Console.WriteLine("同学们的成绩按照一定顺序排列为" + al[i] + "分");
            }
            double ave = 0;
            ave = (sum - Convert.ToInt32(al[0]) - Convert.ToInt32(al[4])) / (al.Count-2);
            Console.WriteLine("你们班的平均分为"+ave+"分");

            Console.ReadLine();
        }
    }
}