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

namespace 构造函数
{
    class Program
    {
        static void Main(string[] args)
        {
            person p1 = new person();
            p1.num = 55;
            p1.showName();
            Console.ReadKey();
        }
    }

    class person
    {
        private int age;
        public int num
        {
            set
            {
                this.age = value;
            }
            get
            {
                return this.age;
            }
        }
        public void showName()
        {
            Console.WriteLine(this.age);
        }
    }
}