one_wire_disp

PIC18F2420 用中断方式从0加到9999 采用四位工阳极数码管(PIC18F2420 interrupt from 0 added to the 9999 four workers anode digital tube)

在飞思卡尔32位的单片机K60的平台上实现线性CCD采集图像的功能；能够实现自动曝光功能；很好的调节图像；(K60 implemented on Freescale MCU platform 32 linear CCD image acquisition functions able to achieve automatic exposure function well adjust the image )

msp430实现12864的菜单显示功能(msp430 realization of the menu display 12864)

双步进电机综合控制 用于51单片机 (Dual stepper motor integrated control)

用整数存储私有成员：年、月和日。为类提供构造函数，能够对各成员进行初始 化，但出现错误的初值时, 成员为2000-1-。也可以不在不提供任何初值的情况 下日期为2000-1-1。另外可以用一个Date 对象进行初始化，成员函数应实现以 下功能： （1） 对所有成员一次性赋值，也能对某个成员单独赋值，能够一次返回所有成 员的值，也能单独返回某个成员的值 （2） 可以按照mm-dd-yyyy 格式输出日期。 （3） 有成员函数nextDay（），用于将日期增加一天(Integer stored the private Members: year, month, and day. Class provides a constructor to initialize the members, but the wrong initial value, members 2000-1-. The date can also be not the case does not provide any initial value 2000-1-1. Also available on a Date object is initialized, the member function should achieve the following functions: (1) all members of the one-time assignment, can also be a member of a separate assignment, to return once the value of all the members, but also separate return a The members of the value (2) according to the date of mm-dd-yyyy format output. (3) member function nextDay () for additional day date)

采用VB编写的一个电路分析系统，支持现行电路的分析，具有电路图绘制，仿真功能，并包含了示波器等元器件。(using VB prepared a circuit analysis system, in support of the current circuit, with circuit diagrams mapping, simulation function, and includes components such as oscilloscopes.)

最新最全的二条码编码资料大全，全面介绍如何制作PDF417、QrCode、DataMatrix、Hanxin等条码制作方法，有详细图文说明，有了此文档，编码无忧。(The latest and most complete the two yards encoding information Daquan, comprehensive introduction to how to make the PDF417, QrCode, DataMatrix, Hanxin barcode production methods, with detailed captions, this document encoding worry-free.)

射频技术 基于rc500的射频开发系统 频率稳定 不易失真(RF radio frequency technology development system based on rc500 frequency stability is not easy distortion)

使用读卡器实现了为个人化的IC卡数据读写(Achieved using the reader for personal IC card data read and write)

说明：  下面的程序利用友元函数求两点间的距离。请你将有关的程序补充完整，并总结为什么这里要用友元函数来求两点间的距离。(using friend to get the result.)