using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace _2{class Program{static void Main(string[] args){Contact c1 = new Contact("王小明");//只有姓名，后面都是默认c1.Output();Contact c2 = new Contact("张珊", false, "18901890189");//都有c2.Output();Contact c3 = new Contact("王强", address: "南京市雨花台路1号");//跳过了手机和性别，一般来说，重载函数是不可以跳过的，除非名称后加冒号赋值）；c3.Output();}}public class Contact{private string _name;private bool _bMan;private string _phone;private string _address;public Contact(string name, bool bMan = true, string phone = "未知", string address = "未知"){_name = name;_bMan = bMan;_phone = phone;_address = address;}public void Output(){Console.WriteLine("{0},{1}", _name, _bMan ? '男' : '女');Console.WriteLine("电话：{0},地址：{1}\r\n", _phone, _address);}}}
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