A Activity diagram used in UML 6/9 and SysML B Bachman diagram Booch used in software engineering Block diagram Block Definition Diagram BDD used in SysML C Carroll diagram Cartogram Catalytic cycle Chemical equation Curly arrow diagram Category theory diagrams Cause-and-effect diagram Chord diagram Circuit diagram Class diagram from UML 1/9 Collaboration diagram from UML 2.0 Communication diagram from UML 2.0 Commutative diagram Comparison diagram Component diagram from UML 3/9 Composite structure diagram from UML 2.0 Concept map Constellation diagram Context diagram Control flow diagram Contour diagram Cordier diagram Cross functional flowchart D Data model diagram Data flow diagram Data structure diagram Dendrogram Dependency diagram Deployment diagram from UML 9/9 Dot and cross diagram Double bubble map used in education Drakon-chart E Entity-Relationship diagram ERD Event-driven process chain Euler diagram Eye diagram a diagram of a received telecommunications signal Express-G Extended Functional Flow Block Diagram EFFBD F Family tree Feynman diagram Flow chart Flow process chart Flow diagram Fusion diagram Free body diagram G Gantt chart shows the timing of tasks or activities used in project management Grotrian diagram Goodman diagram shows the fatigue data example: for a wind turbine blades H Hasse diagram HIPO diagram I Internal Block Diagram IBD used in SysML IDEF0 IDEF1 entity relations Interaction overview diagram from UML Ishikawa diagram J Jackson diagram K Karnaugh map Kinematic diagram L Ladder diagram Line of balance Link grammar diagram M Martin ERD Message Sequence Chart Mind map used for learning, brainstorming, memory, visual thinking and problem solving Minkowski spacetime diagram Molecular orbital diagram N N2 Nassi Shneiderman diagram or structogram a representation for structured programming Nomogram Network diagram O Object diagram from UML 2/9 Organigram Onion diagram also known as "stacked Venn diagram" P Package diagram from UML 4/9 and SysML Parametric diagram from SysML PERT Petri net shows the structure of a distributed system as a directed bipartite graph with annotations Phylogenetic tree - represents a phylogeny evolutionary relationships among groups of organisms Piping and instrumentation diagram P&ID Phase diagram used to present solid/liquid/gas information Plant Diagram Pressure volume diagram used to analyse engines Pourbaix diagram Process flow diagram or PFD used in chemical engineering Program structure diagram R Radar chart Radial Diagram Requirement Diagram Used in SysML Rich Picture R-diagram Routing diagram S Sankey diagram represents material, energy or cost flows with quantity proportional arrows in a process network. Sentence diagram represents the grammatical structure of a natural language sentence. Sequence diagram from UML 8/9 and SysML SDL/GR diagram Specification and Description Language. SDL is a formal language used in computer science. Smith chart Spider chart Spray diagram SSADM Structured Systems Analysis and Design Methodology used in software engineering Star chart/Celestial sphere State diagram are used for state machines in software engineering from UML 7/9 Swim lane Syntax diagram used in software engineering to represent a context-free grammar Systems Biology Graphical Notation a graphical notation used in diagrams of biochemical and cellular processes studied in Systems biology System context diagram System structure Systematic layout planning T Timing Diagram: Digital Timing Diagram Timing Diagram: UML 2.0 TQM Diagram Treemap U UML diagram Unified Modeling Language used in software engineering Use case diagram from UML 5/9 and SysML V Value Stream Mapping Venn diagram Voronoi diagram W Warnier-Orr Williot diagram Y Yourdon-Coad see Edward Yourdon, used in software engineering
ASCII码对照表介绍了ASCII码的定义、历史和收录的128个字符,以及它们的不同进制表示形式。 另外,还提供了扩展ASCII码对照表,它是标准ASCII编码的补充。
扩展ASCII码对照表(非常详细) ASCII 编码可以分成两部分,前 128 个字符称为标准 ASCII,是学习编程语言必须了解的,后 128 个字符称为扩展 ASCII。 让每个字符的第 8 位(最高位)也参与编码,就形成了扩展 ASCII。
完整的ASCII码对照表以及各个字符的解释 ASCII(American Standard Code for Information Interchange,美国信息互换标准代码)是一套基于拉丁字母的字符编码,共收录了 128 个字符,用一个字节就可以存储,它等同于国际标准 ISO IEC 646。
在 ASCII 编码中,大写字母、小写字母和阿拉伯数字都是连续分布的(见下表),这给程序设计带来了很大的方便。 例如要判断一个字符是否是大写字母,就可以判断该字符的 ASCII 编码值是否在 65~90 的范围内。
它和0一样吗? 在C语言中,'0' 和 0 虽然看起来相似,但实际上它们是完全不同的概念: '0' 是一个字符,代表的是 ASCII 码表中的字符 '0';在大多数编码系统中,字符 '0' 的 ASCII 码值是 48。 这意味着当我们在 C 程序中使用 '0' 时,实际上是在使用一个整数值 48。
C 由C语言发展而来,几乎完全兼容C语言;换句话说,你编写的C语言代码几乎可以不加修改地用于 C 。 C语言是面向过程的语言,C 在此基础上增加了面向对象以及泛型编程机制,因此 C 更适合大中型程序的开发。然而,C 并没有牺牲效率,如果不使用高级特性,它的效率和C语言几乎没有差异 ...
C语言中的转义字符(新手必看) 在 C 语言中, '\数值' 被称作转义字符,它虽然是用多个字符编写的,但实际上对应 ASCII 码表中的一个字符。 例如, \0 对应的是 ASCII 码表中第一个字符,如下图所示。
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Python 是一门开源免费、通用型的脚本编程语言,它上手简单,功能强大,坚持「极简主义」。 Python 类库(模块)极其丰富,这使得 Python 几乎无所不能,不管是传统的 Web 开发、PC 软件开发、Linux 运维,还是当下火热的机器学习、大数据分析、网络爬虫,Python 都能胜任。 这套 Python 基础教程不是教 ...
在底层, char 实际上是一个整数类型,它存储的是字符对应的 ASCII 码(或系统使用的字符集编码,如 Unicode 的子集)。 例如,字符 'A' 的 ASCII 值是 65。 char 有三种变体: char:默认类型,可能是 signed 或 unsigned,取决于编译器实现。
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