构造函数

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

namespace _Test
{
    class Program
    {
        static void Main(string[] args)
        {

            //Student s = new Student("张三", 100, 100, 100);
            
            //Student zsStudent = new Student("张三", 18, ‘男‘, 100, 100, 100);

            //zsStudent.SayHello();
            //zsStudent.ShowScore();
            //Console.ReadKey();

           // Student xlStudent = new Student("小兰",78,79,89);
            Student xlStudent = new Student("小兰",19,‘女‘);

            xlStudent.SayHello();
            xlStudent.ShowScore();
            Console.ReadKey();



        }
    }


    public class Student
    {
        //字段、属性、方法、构造函数

        //析构函数  构造函数



        //当程序结束的时候  析构函数才执行
        //帮助我们释放资源
        //GC垃圾回收器一般自动调用，极少有手动调用的。
        //~Student()
        //{
        //    Console.WriteLine("我是析构函数");
        //}

        //构造函数
        public Student(string name, int age, char gender, int chinese, int math, int english)
        {
            this.Name = name;
            this.Age = age;
            this.Gender = gender;
            this.Chinese = chinese;
            this.Math = math;
            this.English = english;
        }

        public Student(string name, int chinese, int math, int english) : this(name, 0, ‘c‘, chinese, math, english)
        {
            //使用this后下面代码可省了。
            //this.Name = name;
            //this.Chinese = chinese;
            //this.Math = math;
            //this.English = english;
        }

        //构造函数重载
        public Student(string name, int age, char gender)
        {
            this.Name = name;
            if (age < 0 || age > 100)
            {
                age = 0;
            }
            this.Age = age;
            this.Gender = gender;
        }

        //当我们不主动使用构造函数时，系统会自动生成如下构造函数
        public Student()
        {

        }


        //私有字段
        private string _name;
        //共有属性
        public string Name
        {
            //get控制是否可读
            get { return _name; }
            //set控制是否可写
            set { _name = value; }
        }

        private int _age;
        public int Age
        {
            get { return _age; }
            set
            {
                if (value < 0 || value > 100)
                {
                    value = 0;
                }
                _age = value;
            }
        }
        private char _gender;
        public char Gender
        {
            get
            {
                if (_gender != ‘男‘ && _gender != ‘女‘)
                {
                    return _gender = ‘男‘;
                }
                return _gender;
            }
            set { _gender = value; }
        }
        private int _chinese;
        public int Chinese
        {
            get { return _chinese; }
            set { _chinese = value; }
        }
        private int _math;
        public int Math
        {
            get { return _math; }
            set { _math = value; }
        }
        private int _english;
        public int English
        {
            get { return _english; }
            set { _english = value; }
        }


        public void SayHello()
        {
            Console.WriteLine("我叫{0},我几年{1}岁了，我是{2}生", this.Name, this.Age, this.Gender);
        }

        public void ShowScore()
        {
            Console.WriteLine("我叫{0}，我的总成绩是{1}，平均成绩是{2}", this.Name, this.Chinese + this.Math + this.English, (this.Chinese + this.Math + this.English) / 3);
        }

    }
}