摘要：
创建表create table username1(id int not null,name nvarchar(10) not null,age int not null,primary key(id));insert into username1(id,name,age)values (1,N'小妹',13);insert into username1(id,name,age)values (2,N'多少妹',33);insert into username1(id,name,age)values (3,N'地方',54);insert int 阅读全文
摘要：
using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 常量{ class Program { public const int pi = 3;//常量在所有函数中都可调用，不用new static void Main(string[] args) { const int ppp = 222;//局部常量 } }}----------using System;using System.Collections.Generic;using System.Linq;usin 阅读全文