给一篇编程
⑴ 求一篇c++编程介绍的英语作文
The computer was born early, people to use computer to program in machine language or assembly language. The world's first computer advanced language was born in 1954 in FORTRAN language. After the emergence of a variety of advanced computer language, one of the most widely used, the greatest impact when pushing the BASIC language and C language. BASIC language is the two professors in 1964 by Dartmouth John G. Kemeny and Thomas E. Kurtz simplified into the basis of FORTRAN language, suitable for beginners of small high-level language design; C language is developed by Baer in 1972 American laboratory in D.M.Ritchie, using structured programming methods, follow the principle of top-down. [1] in the operating system and system using the program as well as needed to operate the hardware settings, using C language is obviously better than other high-level languages, but in writing large programs, C language is still facing challenges.
In 1983, on the basis of C language of the Baer laboratory Bjarne Stroustrup launched C++. C++ further expansion and improvement of the C language, is a kind of object-oriented programming language, the popular C language version.
The origin of the name
The name C++ Rick Mascitti in 1983 proposed, and was first used in 1983 December. Earlier, is still in the development stage of language has been called the "new C", then "C with Classes" is [2]. In computer science, C++ is still called the upper structure of C language. It finally gets its name from the C language in the "+ +" operator (the increment of the value of a variable). But in the naming conventions in common, use "+" to denote the enhancement program. Stroustrup said: "this name represents the natural evolution from C language change".
Note: C+ is the early programming language a and C/C++ independent.
Rick Mascitti has been informally asked about the origin of the name in 1992, which he said was spoken in half make fun of. He never thought C++ would become the official name of the language. A C++ name joke, when you use the suffix + +, additional occurs only in the computation (and hence, it should be ++C, but not C++, the joke is that nowadays some programmers to use C way to use C++, which is usually some authority is not true).
Development history
In "C with Class" stage of development, features of the C language based on the added are: class and a derived class, shared and private members, the distinction between class constructor and destructor, friend, inline functions, the assignment operator overloading.
Published in 1985, added the C++ language version 1 in the content of some important characteristics: the concept, function and operator overloading, virtual function reference, constant (constant) etc..
Launched in 1989 2 edition to form a more perfect support object-oriented programming language C++, the addition of new content including: protected members of a class, multiple inheritance, object initialization and assignment of recursive mechanism, an abstract class, static member function, the const member function.
In 1993 3 of the C++ language version is the C++ language to further improve, the new feature is the most important template (template), in addition to the problem of ambiguity of the two generation of multiple inheritance and the corresponding constructor and destructor disposal solution.
In 1998 the C++ standard (ISO/IEC14882 Standard for the C++ Programming Language) by the international organization for Standardization (ISO) and American Standards Association (ANSI) approval, the standard C++ language and standard library more embodies the C++ language, the original intention of the design. The concept, the standard template library name space (STL) standard container class, increase the general class of algorithms and string types that C++ language is more practical. Since C++ is an international standard programming language, the standard is usually referred to as ANSI C++ or ISO C++ 98 Standard, every 5 years as a standard update actual needs.
Later in 2003 passed the C++ version second (ISO/IEC 14882:2003): this new version is a technical revision of the first edition, collation -- Amendment error, rece the ambiguity, but did not change the language characteristics. This version is often referred to as the C++03. [1]
Since then, the new draft standards called C++ 0x. For the final C++ 0x draft standard international voting ended on August 10, 2011, and all countries had cast votes, C++0x has be beyond all doubt to become the official international standard. Previously was temporarily named new standard C++0x formally known as ISO/IEC 14882:2011, ISO C++ 11. The C++ 11 standard will replace the current C++ standards C++98 and C++03. The international organization for Standardization in September 1, 2011 published by the "ISO/IEC 14882:2011", the name is: Information technology - Programming languages - C++ Edition: 3
⑵ 谈谈java编程
复杂
不知道
为什么回答
为了两分。。
JAVA
是手机的一个系统
可以用那个上移动QQ
可以从网上下载些游戏
貌似我只知道这么多
⑶ 编程怎么学。
如何学习编程,主要有自学和报班两种途径,至于需不需要报班,可以结合自己的实际情况来进行判断,这里简单介绍下。
学编程的注意点:
1、要确定好自己一定能学下去,不能是三分钟的热度,只是学个热闹,这样永远没有办法学的会。
2、一定要打好基础,刚开始学习编程的时候可能会很慢,感觉自己没学会啥,这可能是因为正处于打基础的阶段,只有把基础打好,未来才可以学得更好。
3、要注意实践操作,理论知识学得再多,如果不能实际的运用,还是等于0的。
自学还是报班:
1、如果你可以规划好自己的学习过程,坚持一步步向前走,那么自学当然是很好的。
2、如果你没人监督就学不进去,也没有自己的学习规划,那么还是建议你报班,可以少走冤枉路。
不管是自学还是报班,学编程的要注意的点是相差不大的,希望我的回答对你有帮助!
⑷ 求一篇PLC编程的论文
PLC可编程技术论文 可编程控制器(Programmable Controller)是计算机家族中的一员,是为工业控制应用而设计制造的。早期的可编程控制器称作可编程逻辑控制器(Programmable Logic Controller),简称PLC,它主要用来代替继电器实现逻辑控制。随着技术的发展,这种装置的功能已经大大超过了逻辑控制的范围,因此,今天这种装置称作可编程控制器,简称PC。但是为了避免与个人计算机(Personal Computer)的简称混淆,所以将可编程控制器简称PLC。 PLC是一种专门为在工业环境下应用而设计的数字运算操作的电子装置。它采用可以编制程序的存储器,用来在其内部存储执行逻辑运算、顺序运算、计时、计数和算术运算等操作的指令,并能通过数字式或模拟式的输入和输出,控制各种类型的机械或生产过程。PLC及其有关的外围设备都应该按易于与工业控制系统形成一个整体,易于扩展其功能的原则而设计。 PLC的特点:1可靠性高,抗干扰能力强。2硬件配套齐全,功能完善,适用性强 。3易学易用.4系统的设计、安装、调试工作量小,维护方便,容易改造 .5体积小,重量轻,能耗低 . 一、 当代PLC技术的发展趋势 发展迅速,产品更新换代;开发各种智能化模块,不断增强过程功能;PLC与个人计算机(PC)结合;通信联网功能不断增强;发展新的编程语言,增强容错功能。 二、 当代PLC技术的发展动向 美国通用汽车以用户身份提出新一代控制器应具备十大条件,这十大条件是: 1. 编程方便,可在现场修改程序; 2. 维修方便,最好是插件式; 3. 可靠性高于继电器控制柜; 4. 体积小于继电器控制柜; 5. 可将数据直接送入管理计算机; 6. 在成本上可与继电器控制竞争; 7. 输入可以是交流115V; 8. 输出为交流115V/2A以上,能直接驱动电磁阀; 9. 在扩展时,原有系统只要很小变更; 10. 用户程序存储容量至少能扩展到4K字节。 可编程控制器PLC中有多种程序设计语言,它们是:梯形图语言、布尔助记符语言、功能表图语言、功能模块图语言及结构化语句描述语言等。 目前,PLC应用人才供应主要依靠高校(设相关专业的有267所)、高职(600多所)和技校(2000多所)。其相关的专业一般名为“自动化”、“机械制造及自动化”、“电气自动化”和“机电一体化”。 21世纪,PLC会有更大的发展。从技术上看,计算机技术的新成果会更多地应用于可编程控制器的设计和制造上,会有运算速度更快、存储容量更大、智能更强的品种出现;从产品规模上看,会进一步向超小型及超大型方向发展;从产品的配套性上看,产品的品种会更丰富、规格更齐全,完美的人机界面、完备的通信设备会更好地适应各种工业控制场合的需求;从市场上看,各国各自生产多品种产品的情况会随着国际竞争的加剧而打破,会出现少数几个品牌垄断国际市场的局面,会出现国际通用的编程语言;从网络的发展情况来看,可编程控制器和其它工业控制计算机组网构成大型的控制系统是可编程控制器技术的发展方向。目前的计算机集散控制系统DCS(Distributed Control System)中已有大量的可编程控制器应用。伴随着计算机网络的发展,可编程控制器作为自动化控制网络和国际通用网络的重要组成部分,将在工业及工业以外的众多领域发挥越来越大的作用
麻烦采纳,谢谢!