黑马程序员_构造函数实例

using System;

using System.Collections.Generic;

using System.Linq; using System.Text;

//2014.3.13

namespace 构造函数 {

    class Program

    {

        static void Main(string[] args)

        {

            Person p1 = new Person();

            Person p2 = new Person("tom");

            Person p3 = new Person("jerr",18);

            Console.WriteLine("年龄是{0}，名字叫{1}",p1.Age,p1.Name);

            Console.WriteLine("年龄是{0}，名字叫{1}", p2.Age, p2.Name);

            Console.WriteLine("年龄是{0}，名字叫{1}", p3.Age, p3.Name);

            Console.ReadKey();

        }

    }

    /// <summary>

    /// 函数名和类名一样，没有返回值，连void都不用。

    /// 构造函数用来创建对象，并且可以在构造函数中对对象进行初始化

    /// 构造函数可以重载

    /// </summary>

    class Person

    {

        public string Name { get;set; }

        public int Age { get; set; }

        public Person()

        {

            Name = "未命名";

            Age = 0;

        }

        public Person(string name)

        {

            this.Name = name;

        }

        public Person(string name, int age)

        {

            this.Name = name;

            this.Age = age;

        }

    }

}