20141211--C# 構造函數，

20141211--C# 構造函數，

namespace fengzhuang
{
    class Class2
    {
        private string _Name;
        private string _Code;
        public string _Sex;

        public Class2()//構造函數
        {
            _Sex = "男";//每次初始化都會默認_Sex的值為“男”
            Console.WriteLine("構造函數");
        }
        public string nv()//函數 
        {
            _Sex = "女";
            return _Sex;
        }
    }
}

 

static void Main(string[] args)
        {
            Class2 op=new Class2();//本身就存在的，只要初始化一下類，便會調用函數，
            Console.WriteLine(op._Sex);
            op.nv();//調用函數，
            Console.WriteLine(op._Sex);
            Console.WriteLine();
            Console.ReadLine();
        }

using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Text; namespace xueshengxuanke { class Program { static void Main(string[] args) { Console.WriteLine("請輸入學生人數："); int n = int.Parse(Console.ReadLine()); Console.WriteLine("請輸入學生學號、姓名、分數"); ArrayList arr = new ArrayList(); for (int i = 0; i < n; i++) { student s = new student(); Console.Write("學號："); s.Code = int.Parse(Console.ReadLine()); Console.Write("姓名："); s.Name = Console.ReadLine(); Console.Write("分數："); s.Score = decimal.Parse(Console.ReadLine()); arr.Add(s); } decimal sum = 0; for (int i = 0; i < n; i++) { student avgs = (student)arr[i]; sum += avgs.Score; } ArrayList newarr = new student().Maopao(arr); student ss1 = (student)newarr[0]; Console.WriteLine("姓名：{0}最高分為：{1}", ss1.Name, ss1.Score); int x = n - 1; student ss2 = (student)newarr[x]; Console.WriteLine("姓名：{0}最低分為：{1}", ss2.Name, ss2.Score); Console.WriteLine("平均分：{0}", sum / n); for (int i = 0; i < n; i++) { student avgs = (student)newarr[i]; Console.WriteLine("學生名次為：***********************************"); Console.WriteLine("學號 姓名 分數 名次"); Console.WriteLine("{0} {1} {2} {3}", avgs.Code, avgs.Name, avgs.Score, i + 1); } Console.ReadLine(); } } }

 

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace xueshengxuanke
{
    class student
    {
        private int _Code;

        public int Code
        {
            get { return _Code; }
            set { _Code = value; }
        }
        private string _Name;

        public string Name
        {
            get { return _Name; }
            set { _Name = value; }
        }
        private decimal _Score;

        public decimal Score
        {
            get { return _Score; }
            set { _Score = value; }
        }

        /// <summary>
        /// 接收arraylist，排序後，返回arraylist
        /// </summary>
        /// <param name="arr">存放了student類對象的arraylist</param>
        /// <returns>返回排序後的集合</returns>
        public ArrayList Maopao(ArrayList arr)
        {
            int n = arr.Count;
            for (int i = 0; i < n; i++)
            {
                for (int j = i; j < n; j++)
                {
                    student s1 = (student)arr[i];
                    student s2 = (student)arr[j];
                    if (s1.Score < s2.Score)
                    {
                        student zhong = new student();
                        zhong = s1;
                        arr[i] = s2;
                        arr[j] = zhong;
                    }
                }
            }

            return arr;
        }
    }
}