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
摘要:
namespace 对象的引用{ class Program { static void Main(string[] args) { int i = 10; int j = i; i++; Console.WriteLine(j);//输出10值类型是传递拷贝,不能引用指向的值 Person a = new Person(); Person b = a; a.Shengao++; Console.WriteLine(b.Shengao);//对象是引用类型,是传递的引用。a变b变 Console.ReadKey(); } } class Person { private int shengao 阅读全文
摘要:
using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 练习{ class Program { static void Main(string[] args) { //第一个练习 /* int sum = 0; int i; for(i=1;i<101;i++) { sum = sum + i; } Console.WriteLine("{0}",sum); */ //练习2 /* string s = Console.ReadLine(); 阅读全文