C#基础经典案例.
关键词:c#刚开始应该怎么学|C#基础怎么快速掌握
C#是现在软件行业最流行的语言之一,要想掌握他的经典之处,一定要懂的仔细琢磨,并且多做练习。这样掌握的更快。下面是我总结的一些基础,因为案例都写在了一块,所以注释掉了。学习的话可以一点一点去掉注释,运行测试,主要是看懂程序就行。同时测试运行的看一下,是否和自己的猜测一致。
using System;
//using System.Collections.Generic;
//using System.Linq;
//using System.Text;
namespace ConsoleApp
{
class UserInfo
{
}
class Program
{
enum MyEnum
{
Sunday = 10, Monday, Tuesday, Wednesday, Thursday, Friday, saturday
}
static void Main(string[] args)
{
//Console.WriteLine("你好,请输入你的姓名");
//string strName = Console.ReadLine();
//Console.WriteLine("欢迎你" + strName);
//Console.ReadLine();
//if (args.Length==0)
//{
// Console.WriteLine("没有参数");
//}
//for (int i = 0; i < args.Length; i++)
//{
//Console.WriteLine("第"+i.ToString()+"个参数是"+args[i]);
// //或者写成Console.WriteLine("第{0}个参数是{1}",i.ToString(), args[i]); //
//}
//short x = 32766;
//x++;
//Console.WriteLine(x);
//x++;
//Console.WriteLine(x);
//MyEnum en = MyEnum.Friday;
//Console.WriteLine((int)en);
// string str = "张三$李四$王五$李世民$";
//string str = "";
//for (int i = 0; i < 10; i++)
//{
// str += "用户" + i.ToString()+"$";
//}
//str = str.TrimEnd(new char[] { '$'});
//当i=9的那次,加了$符号,所以要把最后面的那个$符号给去掉
//string[] strNames = str.Split(new[] { '$','@'});
//当有两类以上的符号时,例如"张三$李四@王五$李世民$"可用词方法。
//for (int i = 0; i < strNames.Length; i++)
//{
// Console.WriteLine("第"+i.ToString()+"个用户是"+strNames[i].Trim()); //}
//string strFile=@"E:\MCPD2011-11\C#课件\Demo\struct.txt";
//Console.WriteLine(https://www.sodocs.net/doc/781639768.html,stIndexOf("\\")); //最后一次出现斜线“\”的索引 //string strResult = strFile.Substring(https://www.sodocs.net/doc/781639768.html,stIndexOf("\\")+1,
// strFile.Length - https://www.sodocs.net/doc/781639768.html,stIndexOf("\\")-1);
//字符串索引下表是以0开始的,所以一定要再减去一个1
//Console.WriteLine(strResult+"\n"+"aa");
//UserInfo u = new UserInfo();
//object obj = u; //object是所有类的父类
//隐式转换
//short ss= 100;
//int ii = ss;
//int ii = 100;
//short ss = (short)ii;
//string ss = "100";
//int ii = int.Parse(ss);
string ss = "100";
int ii = Convert.ToInt32(ss);
string strDate = "2011-12-08";
DateTime dt = Convert.ToDateTime(strDate);
Console.WriteLine("时间是" + dt.ToString()); Console.ReadLine();
}
}
}
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