例题：输入身份证号码，判断你是什么生肖。switch,case练习，substring 类使用联系，会用取余

Console.WriteLine("请输入您的身份证号码");

string x = Console.ReadLine();

string year=x.Substring (6,4);//从身份证的第六位开始截取，往后截取四位，就是你的出生年份

int x1 = Convert.ToInt32(year);//把截取到年份代入到x1中，

string sx = "";

switch(x1%12)//输入一个年份取余，如果假设取余为四，你能判断那年的生肖，然后根据十二生肖排列，判断取余为0到12分别为哪个生肖

{

case 0:

sx="狗";

break;

case 1:

sx = "鸡";

break;

case 2:

sx = "猴";

break;

case 3:

sx = "羊";

break;

case 4:

sx = "马";

break;

case 5:

sx = "蛇";

break;

case 6:

sx = "龙";

break;

case 7:

sx = "兔";

break;

case 8:

sx = "虎";

break;

case 9:

sx = "牛";

break;

case 10:

sx = "鼠";

break;

case 11:

sx = "猪";

break;

default :

sx = "请输入正确的年份";

break;

}

Console.WriteLine("您的生肖是"+sx);

Console.ReadLine();