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这是非常有挑战性的题目。对于用户输入的任意一个平面函数f(x),绘制出其函数曲线。这里最关键的技术难点就是如何实现计算表达式的值。在《编译原理》和《数据结构》的...
这是非常有挑战性的题目。对于用户输入的任意一个平面函数f(x),绘制出其函数曲线。这里最关键的技术难点就是如何实现计算表达式的值。在《编译原理》和《数据结构》的书中,都有对表达式运算方法的论述。说实在的,在编译型计算机语言中实现对用户输入表达式的运算是非常困难的。需要对表达式进行扫描,去括号,按照运算符的优先级生成2叉树,然后遍历该树生成逆波兰表达式,再然后通过栈的方法进行运算。如果在表达式中再包含有函数的话......描述起来都麻烦,更不要说用程序实现了:-(-This is a very challenging issue. For user input an arbitrary planar function f (x), mapping out its function curves. Here the most critical technical problems is how to achieve calculated the value of the expression. "Compiling Principle" and "data structure," the book, have right of expression Operational discussed. Indeed, the computer language compiler to achieve expression of the user input operation is very difficult. Need to scan expression to the brackets, in accordance with the priority Operators Generation 2-ary tree, and then traverse the tree generated reverse Polish expression, and then through the stack approach to computing. If the expression again contains the function described ...... these are trouble, not to mention t
- 2022-02-25 13:48:40下载
- 积分:1
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51单片机的智能反汇编
code:5548823116
51单片机的智能反汇编
code:5548823116-51 microcontroller smart anti-compilation code : 5548823116
- 2022-03-16 16:51:30下载
- 积分:1
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canteen EL keyboard Illumination IC card management system source code, which is...
IC卡饭堂售饭管理系统源码,内有相关说明,-canteen EL keyboard Illumination IC card management system source code, which is related note,
- 2022-02-15 09:43:22下载
- 积分:1
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一个串口通信的例子,简单的。。可以先学习。
一个串口通信的例子,简单的。。可以先学习。-Example of a serial communication, simple. . Can learn.
- 2022-09-07 00:00:03下载
- 积分:1
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开源串口利用Xmodem,Ymodem,ZModem 下载,上传的程序.在Linux,Arm
开源串口利用Xmodem,Ymodem,ZModem 下载,上传的程序.在Linux,Arm-Linux 都可使用-Open serial port using Xmodem, Ymodem, ZModem download, upload procedure. In Linux, Arm-Linux can be used
- 2022-08-13 12:28:55下载
- 积分:1
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MSComm控件的信息,Visual Basic 6(以下简称VB)是一个强大的,相对的…
MSComm控件资料,Visual Basic 6.0(以下简称VB) 是一种功能强大、简单易学的程序设计语言。它不但保留了原先Basic语言的全部功能,而且还增加了面向对象程序设计功能。它不仅可以方便快捷地编制适用于数据处理、多媒体等方面的程序,而且利用ActiveX控件MSComm还能十分方便地开发出使用计算机串口的计算机通信程序。本文结合计算机通信的两个例子,详细介绍如何在VB中使用MSComm控件。
处理方式
-MSComm information, Visual Basic 6.0 (VB hereinafter) is a powerful, relatively simple programming language. It not only retains the original Basic language functionality, but also an increase of object-oriented programming design functions. It will not only facilitate the efficient preparation of the application to data processing, multimedia and other aspects of the procedure, and the use of MSComm ActiveX control can be very convenient to use the computer to develop the computer serial port Communication Program. Based on computer communication, the two examples in detail how to use VB MSComm. Approach
- 2023-01-06 13:35:04下载
- 积分:1
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arm under the serial port communication program, function well, can be used to p...
arm下实现的串行口通信程序,功能完好,可以用ads编写-arm under the serial port communication program, function well, can be used to prepare ads
- 2022-02-21 09:46:47下载
- 积分:1
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从串口读取数据,有两种方法,1、每接收一个EV_RXCHAR,就用ReadFile读一次,这样我觉得太恐怖了。2、接收到一个EV_RXCHAR后,等一定数据量的...
从串口读取数据,有两种方法,1、每接收一个EV_RXCHAR,就用ReadFile读一次,这样我觉得太恐怖了。2、接收到一个EV_RXCHAR后,等一定数据量的CPU周期(GetTickCount),再一次性读取缓冲区里的数据。这样做,一般情况下不会有问题,但是,如果数据很多,过了“一定数据量的CPU周期”,还没收完数据怎么办?就会少读数据了。 我用三个线程序来完成串口数据的接收,其实就是第一种方法的变种: 一个侦听EV_RXCHAR,一个对EV_RXCHAR进行分析,其实就是超时判断。如果接收到一个消息后,一段时间没收到下一个EV_RXCHAR,就认为是一个数据包的结束。这个线程就会通知数据接收线程,进行数据接收。一般同一包数据,两个字符之间的时间间隔,应该很小了吧,而两个数据包之间的间隔,应该不会太小吧!(这个地方我不清楚,猜的:( :) )最后一个线程,是接收数据的。-read data from the serial port, there are two methods, one, each receiving a EV_RXCHAR, on the ReadFile read, I think this vote. 2, received a EV_RXCHAR after a certain volume of data, such as CPU cycles (GetTickCount), and the one-time reader, the data buffer. To do so, under normal circumstances there is no problem, but if many of the data, and after a "certain amount of data the CPU cycles," also confiscated End Data how do? Few will read the data. I used three lines to complete serial data reception, the first method is a variant : an interception EV_RXCHAR, one pair of EV_RXCHAR analys
- 2023-03-23 09:55:03下载
- 积分:1
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通过xml实现各种pda的通信(借助pc)
通过xml实现各种pda的通信(借助pc)-through xml realize pda communications (using pc)
- 2022-01-25 14:42:41下载
- 积分:1
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use of IC cards issuers of prepaid PB VF BCB DELPHI VC
使用IC卡发卡机构的预付费PB VF BCB DELPHI VC源程序,对其进行了详细说明
- 2023-05-30 12:50:03下载
- 积分:1