using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace EFT2
{
    class Program
    {
        public class User
        {
            private int id;
            private string name;
            private bool liberal_arts;
            private int chinese;
            private int math;
            private int eng;
            private int integrated;

            public int Chinese { get => chinese; set => chinese = value; }
            public int Math { get => math; set => math = value; }
            public int Eng { get => eng; set => eng = value; }
            public int Integrated { get => integrated; set => integrated = value; }

            public int Id { get => id; set => id = value; }
            public string Name { get => name; set => name = value; }
            public bool Liberal_arts { get => liberal_arts; set => liberal_arts = value; }
        }
        public class Scoreval
        {
            
        }

        static List<User> user = new List<User> 
        { 
            new User 
            { 
                Id = 1, Name = "张珊", Liberal_arts=false,Chinese= 127, Math =145,Eng= 122,Integrated= 289
            },
            new User
            {
                Id = 2, Name = "刘亮", Liberal_arts=true,  Chinese=103,Math =145,Eng=122,Integrated=250
            },
            new User
            {
                Id = 3, Name = "薛贵", Liberal_arts=true, Chinese=136,Math =102,Eng=89,Integrated=189
            },
            new User
            {
                Id = 4, Name = "吴迪", Liberal_arts=true, Chinese=126,Math =98,Eng=140,Integrated=238
            }
        } ;
        static void Main(string[] args)
        {

            //列举所有
            var linq = from u  in user select u;
            Console.WriteLine("编号\t" + "姓名\t" + "文科\t" + "语文\t" + "数学\t" + "英语\t" + "综合");
            foreach (var item in linq)
            {
                Console.WriteLine(
                    item.Id.ToString()+ "\t" + item.Name + "\t" + item.Liberal_arts.ToString()+ "\t" + item.Chinese+ "\t" + item.Math+ "\t" + item.Eng+ "\t" + item.Integrated);
            }
            Console.WriteLine("");
            Console.WriteLine("==========筛选文科==========");
            linq = from u in user where u.Liberal_arts == true select u;
            Console.WriteLine("编号\t" + "姓名\t" + "文科\t" + "语文\t" + "数学\t" + "英语\t" + "综合");
            foreach (var item in linq)
            {
                Console.WriteLine(
                    item.Id.ToString() + "\t" + item.Name + "\t" + item.Liberal_arts.ToString() + "\t" + item.Chinese + "\t" + item.Math + "\t" + item.Eng + "\t" + item.Integrated);
            }
            Console.WriteLine("");
            Console.WriteLine("==========文科平均分==========");
            var linq2 = user.Where(u => u.Liberal_arts == true).Average(a => a.Chinese+a.Math+a.Eng+a.Integrated);
            Console.WriteLine("平均分为：{0}", linq2);
        }
    }

    
}