C#語法學習四(Char)

using System;

class Test

{

static void Main()

{

char c='A';

Console.WriteLine((char)65);//強制類型轉換

Console.WriteLine(Convert.ToChar(65));//這种方法速度不及強制類型轉換

}

}

/*

* Created by SharpDevelop.

* User: Administrator

* Date: 2008/8/26

* Time: 下午 11:36

* char是System.Char的一個實例,是值類型的.

* 字符Char,下面的例子是打印0-127r ascii編碼

* To change this template use Tools | Options | Coding | Edit Standard Headers.

*/

using System;

class test

{

static void Main()

{

for(int i=0;i<127;i++)

{

if(i%10==0)

{

Console.WriteLine();

}

Console.Write("{0,3}:{1,-3}",i,(char)i);

}

}

}

/*

* Created by SharpDevelop.

* User: Administrator

* Date: 2008/8/26

* Time: 下午 11:54

*

* To change this template use Tools | Options | Coding | Edit Standard Headers.

*/

//通過十六進制的unicode編碼輸出"你好"

using System;

class test

{

static void Main()

{

Console.WriteLine("\u4F60\u597D");

}

}
using System;

using System.Collections.Generic;

using System.Drawing;

using System.Windows.Forms;

namespace ShowUFT8

{

/// <summary>

/// Description of MainForm.

/// </summary>

public partial class MainForm : Form

{

//前面的部份省略,關鍵是下面這一部份

//輸出unicode編碼

void Button1Click(object sender, EventArgs e)

{

System.Text.StringBuilder s=new System.Text.StringBuilder(0xFFFF*3);

for(int i=128;i<0xFFFF;i++)

{

if(i%50==0)

s.Append("\r\n");

s.AppendFormat("{0,3}",(char)i);

this.textBox1.Text=s.ToString();

}

}

}

}

using System;

class Test

{

static void Main()

{

Console.WriteLine("請輸入一個字符:");

char a;

a=Convert.ToChar(Console.ReadLine());

int i=(int)a;

//漢字是從0x4e00~0x9fa5

if(i<0x4e00 || i>0x9fa5)

Console.WriteLine("不是一個漢字");

else

Console.WriteLine("是一個漢字");

//char.IsLetter(a)char下有一些方法可以驗證是否是字母/數字

}

}