Orange的专栏

原创 __attribute__((packed))使用介绍

转载 Linux 0.11/boot/setup.s

 1 !  2 !       setup.s         (C) 1991 Linus Torvalds  3 !  4 ! setup.s is responsible for getting the system data from the BIOS,  5 ! and putting them into the appropriate places in system memory. 

转载 Linux 0.11/boot/head.s

1 /* 2 * linux/boot/head.s 3 * 4 * (C) 1991 Linus Torvalds 5 */ 6 7 /* 8 * head.s contains the 32-bit startup code. 9 * 10 * NOTE!!! Startup happens at absolute

转载 Linux 0.11/boot/bootsect.s

 1 !  2 ! SYS_SIZE is the number of clicks (16 bytes) to be loaded.  3 ! 0x3000 is 0x30000 bytes = 196kB, more than enough for current  4 ! versions of linux  5 !  6 SYSSIZE = 0x3000  7 !  8 !       b

转载 自己动手写操作系统--"Hello, OS world!"

自己动手写操作系统--"Hello, OS world!"       作者：zieckey(zieckey@yahoo.com.cn)1、开发环境与工具开发环境:winxp+sp2必须安装Bochs-2.3,nasm,UltraEdit.下载nasm后,添加nasm所在目录到到path目录,建议直接将nasm放到windows或system32目录,方便从命令行调用.下载

原创 Java-源代码-二叉排序树

 import java.util.*;class Tree{ Tree left,right; int item; public Tree(Tree left,Tree right,int item) {  this.left=left;  this.right=right;  this.item=item; } public void insert(int item) {  Tree ro

原创 Java-源代码-简单例外捕获演练2

finally子句用来说明必须执行的语句,无论TRY程序块中是否抛出例外,FINALLY程序块中的语句都将会被执行..  public class ExampleFinallyException { public static void main(String[] args)  {  System.out.println("Hello World!");  try  {   int x

原创 Java-源代码-简单例外捕获演练1

public class BadString { public static void main(String[] args)  {  System.out.println("Hello World!");  String name=null;  try  {   if(name.equals("exception"))    System.out.println("My name is "+na

原创 Java-源代码-简单类继承演练

class Superclass {  public boolean aVariable;  public void aMethod() {    aVariable = true;  }  public void aMethod(int i) {    System.out.println(i);  }  public void aMethod(int i, String s) { 

原创 Java-源代码-控制结构演练

public class ProgramControl {  public static void main(String[] args) {    int i;    int nSum = 0;    //for循环    for (i = 0; i       nSum++;      System.out.println("当前的for循环变量值" + i + "累加结果" + nSum);

原创 Java-源代码-运算符演练

public class Operator {  private static void f(boolean b) {    System.out.println(b);  }  public static void main(String[] args) {    int x = 1;    int y = 1;    //运算优先级    //单操作数运算符    //算术运算符    /

原创 C-源代码-计算简单表达式

#include #include #include #include int eadd(int x,int y){return x+y;}int esub(int x,int y){return x-y;}int emul(int x,int y){return x*y;}int ediv(int x,int y){return x/y;}int (*func[])(int,int)={ea

原创 Java源代码-Applet-居中显示文字

import java.awt.*;import java.applet.*;public class PrintCenterString extends Applet{Font F;Color C;FontMetrics FM;int X,Y;int Ascent,Descent,Width,AppletWidth,AppletHeight;String str;public void