jsjnvs的专栏

C语言编写单片机 循环灯

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C语言编写 的C51单片机

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递归下降语法分析器

VB.NET环境下编写的词法分析器，功能比较齐全。

运用汇编语言编写的.asm格式的可执行文件，响铃实验

Visual C++ 面向对象与可视化程序设计（黄维通第二版）教材源代码

fifo，页面置换，c语言版，fifo，页面置换，c语言版

java程序，可以提取系统当前时间日期，每秒都会刷新一次

利用java编写程序，猜数字，最多才十次，过大或过小火猜中均有提示，即窗体颜色会改变

表盘式时钟，并显import java.awt.*; import java.awt.event.*; import javax.swing.*; import sun.util.calendar.Gregorian; import java.util.Calendar; import java.util.GregorianCalendar; public class Clock extends JFrame implements ActionListener{ int x, y, x0, y0, r, h, olds_x, olds_y, oldm_x, oldm_y, oldh_x, oldh_y, ss,mm,hh,old_m,old_h,ang; final double RAD = Math.PI/180; public Clock(){ super("Java时钟"); setDefaultCloseOperation(3); Image image = getToolkit().getImage("clock.gif"); setIconImage(image); setSize(200,200); setBackground(Color.black); setLocation(300,150); setResizable(false); show(); int delay = 1000; //创建一个监听事件 ActionListener drawClock = new ActionListener(){ public void actionPerformed(ActionEvent evt){ repaint(); } }; //创建一个时间计数器，每一秒触发一次 new Timer(delay,drawClock).start(); } //实现ActionListener接口必须实现的方法 public void actionPerformed(ActionEvent evt){} //绘制图形 public void paint(Graphics g){ Graphics2D g2D = (Graphics2D)g; Insets insets = getInsets(); int L = insets.left/2, T = insets.top/2; h = getSize().height; g.setColor(Color.white); //画圆 g2D.setStroke(new BasicStroke(4.0f)); g.drawOval(L+40, T+40, h-80, h-80); r = h/2 - 40; x0 = 40 + r - 5 + L; y0 = 40 + r - 5 - T; ang = 60; //绘制时钟上的12个字 for(int i = 1;i <= 12;i ++){ x = (int)((r+10)*Math.cos(RAD*ang)+x0); y = (int)((r+10)*Math.sin(RAD*ang)+y0); g.drawString(""+i, x, h-y); ang -=30; } //获得现在的时间 Calendar now = new GregorianCalendar(); int nowh = now.get(Calendar.HOUR_OF_DAY); int nowm = now.get(Calendar.MINUTE); int nows = now.get(Calendar.SECOND); String st; if(nowh < 10)st = "0"+nowh; else st = ""+nowh; if(nowm<10)st += ":0"+nowm; else st += ":"+nowm; if(nows<10)st += ":0"+nows; else st += ":"+nows; //在窗体上显示时间 g.setColor(Color.pink); g.fillRect(L, T, 50, 28); g.setColor(Color.blue); g.drawString(st,L+2,T+26); //计算时间与度数的关系 ss = 90 - nows*6; mm = 90 - nowm*