第九天学习内容 结构体

using System;
using System.Collections;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace day09
{
    class Program
    {
        struct student
        {
            public int no;
            public string name;
            public int csharp;
            public int web;
            public int database;
            public int sum;
            public info xinxi;
            public int[] shuzu;
        }
        struct info
        {
            public string jiguan;
            public string dianhua;
        }
        enum meiju: int
        {
            one=3,
            two=6,
            three,
            four=two,
        }
        static void Main(string[] args)
        {

            //用哈希表录入学生信息计算总分和平均分，并输出不及格的学生信息
         /*   Hashtable ht = new Hashtable();
            Console.Write("请输入学生人数：");
            int num = Convert.ToInt32(Console.ReadLine());
            double sum = 0;
            for (int i = 0; i < num; i++)
            {
                ArrayList cjb = new ArrayList();  //新建名为cjb的集合  每循环一次就新建一个cjb的集合
                Console.Write("请输入学生姓名：");
                cjb.Add(Console.ReadLine());      //为其中第一个元素赋值为学生姓名
                Console.Write("请输入学生成绩：");
                cjb.Add(Console.ReadLine());    //为其中第二个元素赋值为学生成绩
                ht.Add(i,cjb);                  //为哈希表赋值，key为循环次数，values为cjb这个集合
                sum += Convert.ToDouble(cjb[1]);  //计算总分

            }
            Console.WriteLine("学生的总成绩为"+sum+"，"+"平均成绩为"+(sum/num));
            //IDictionaryEnumerator ide = ht.GetEnumerator();
            //while (ide.MoveNext())
            //{
            //    Console.WriteLine(ide.Key+"  "+ide.Value);  //枚举类型，所有读取
            //}
            foreach (ArrayList cjb in ht.Values)
            {
                if (Convert.ToDouble(cjb[1]) < 60)  //判断cjb集合中学生成绩小于60的
                {
                    Console.WriteLine("不及格的学生姓名为" + cjb[0] + "," + "成绩为" + cjb[1]);  //输出
                }
            }  

 

 

//用结构体录入学生信息并打印
            student xs = new student();
            Console.Write("请输入人数：");
            int n = Convert.ToInt32(Console.ReadLine());
            ArrayList al = new ArrayList();
            for (int i = 0; i < n; i++)  //循环输入学生信息
            {
                Console.Write("请输入学生学号：");
                xs.no = Convert.ToInt32(Console.ReadLine());
                Console.Write("请输入学生姓名：");
                xs.name = Convert.ToString(Console.ReadLine());
                Console.Write("请输入学生c#成绩：");
                xs.csharp = Convert.ToInt32(Console.ReadLine());
                Console.Write("请输入学生web成绩：");
                xs.web = Convert.ToInt32(Console.ReadLine());
                Console.Write("请输入学生数据库成绩：");
                xs.database = Convert.ToInt32(Console.ReadLine());
                Console.Write("请输入学生的籍贯：");
                xs.xinxi.jiguan = Convert.ToString(Console.ReadLine());
                Console.Write("请输入学生的电话号码：");
                xs.xinxi.dianhua = Convert.ToString(Console.ReadLine());
                xs.shuzu = new int[2];
                xs.shuzu[0] = 1;
                xs.shuzu[1] = 2;  //定义了一个新数组并赋值
                xs.sum = xs.csharp + xs.web + xs.database;
                al.Add(xs);  //将输入的学生信息赋值给al集合中的第i个元素
            }
            for (int i = 0; i < n; i++)
            {
                student temp = (student)al[i];  //将al集合类型强制转换成student类型，并复制给temp
                Console.WriteLine("学号："+temp.no+"\t姓名："+temp.name+"\tc#成绩:"+temp.csharp+"\tweb成绩:"+temp.web+"\t数据库成绩:"+temp.database+"\t籍贯："+temp.xinxi.jiguan+"\t电话号码"+temp.xinxi.dianhua+"\t总成绩："+temp.sum+temp.shuzu[1]);
            }
            */

           
            Console.ReadKey();
        }
    }
}