C#类和结构区别的总结(一)

 

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int i = new int();
            string a = " ";
            Console.WriteLine("{0}{1}",a,i);

            int[] b = new int[10];
            Console.WriteLine(b[3]);

            structOne soInstanceOne = new structOne ();
            Console.WriteLine("soInstanceOne:{0}:{1}", soInstanceOne.filed1, soInstanceOne.filed2);

            structOne[] soArrayOne = new structOne[10];
            Console.WriteLine("soArrayOne[]:{0}:{1}",soArrayOne[2].filed1,soArrayOne[2].filed2 );
            soArrayOne[0].people = new string[4];
            soArrayOne[0].people[0] = "男";
            soArrayOne[0].people[1] = "18";
            soArrayOne[0].people[2] = "Jack";
            foreach (string peopleJack in soArrayOne[0].people)
            {
                Console.WriteLine(peopleJack);
            }

            soInstanceOne.people = new string[3];
            soInstanceOne.people[0] = "女";
            soInstanceOne.people[1] = "17";
            soInstanceOne.people[2] = "Alice";
            foreach (string peopleAlice in soInstanceOne.people)
            {
                Console.WriteLine(peopleAlice);
            }


            Console.WriteLine(structOne.filed4);
            soInstanceOne.StructOneMethodOne();


            classOne Test = new classOne();
            Console.WriteLine ("Test:");
            Console.WriteLine ("{0}:{1}:{2}",Test.cFiled1,Test.cFiled2 ,Test.cFiled3 ); //打印0::false


            Console .ReadLine ();
        }
        struct structOne
        {
            public int filed1; //执行这个语句structOne soInstanceOne = new structOne()之后， filed1的值初始化为0
            public string filed2; //执行这个语句structOne soInstanceOne = new structOne()之后， filed2的值初始化为null
            public string[] people;
            //public sting[] people = { "男", "17", "Jack" };//结构中不能有实例字段初始值设定项,意思就是不能为实例字段赋值
            //private int filed3 = 3;  //不能有实例字段初始值设定项,意思就是不能为实例字段赋值
            public  static int filed4 = 4; //结构中可以为静态字段赋值
            private const string conA = "conA"; //结构中可以为常数字段赋值，因为常数属于Static
            private static string strName = "John"; //结构中可以为静态字段赋值
            public static string[] anotherPeople = { "男", "17", "Tom" }; //结构中可以为静态数组赋值
            public bool bResult;
            public void StructOneMethodOne()
            {
                Console.WriteLine(conA);
                Console.WriteLine(strName);
                Console.WriteLine(bResult);
            }
        }
        class classOne
        {
            public int cFiled1;
            public string cFiled2;
            public bool cFiled3;
        }
    }
}