Chapter 1 Introduction to Computers, Programs, and Java
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Dr. C#: a Pedagogic IDE for C# Featuring a Read-Eval-Print-Loop by Dennis Lu
RICE UNIVERSITY Dr. C#: A Pedagogic IDE for C# Featuring a Read-Eval-Print-Loop by Dennis Lu ATHESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE Master of Science APPROVED,THESIS COMMITTEE: Robert Cartwright, Chair Professor of Computer Science Joe Warren Professor of Computer Science Dan Wallach Assistant Professor of Computer Science Dung X. Nguyen Lecturer, Computer Science Houston, Texas April, 2003 Dr. C#: A Pedagogic IDE for C# Featuring a Read-Eval-Print-Loop Dennis Lu Abstract As the primary programming language of the Microsoft .NET platform, C# will play a significant role in software development for the foreseeable future. As the language rapidly gains popularity in industry, tools made for C# development fo- cus on the professional programmer, while leaving the beginning computer science student behind. To address this problem, we introduce Dr. C#, a simple lightweight develop- ment environment with an integrated, interactive Read-Eval-Print-Loop (REPL). Dr. C# helps flatten the learning curve of both the environment and the language, enabling students to quickly learn key elements of the language and focus more easily on concepts. Dr. C# thus serves not only as a learning tool for beginner students but also as a teaching tool for instructors. The editor is based on an open source IDE called SharpDevelop. This thesis describes the implementation of Dr. C# focusing primarily on building the REPL and integrating with SharpDevelop. Acknowledgments I would like to thank my advisor Professor Robert “Corky” Cartwright for giving me the opportunity and autonomy to develop Dr. C#. I would also like to thank Professor Dung Nguyen for acting as co-advisor and for his years of guidance and support. -
Chapter 1 Introduction to Computers, Programs, and Java
Chapter 1 Introduction to Computers, Programs, and Java 1.1 Introduction • The central theme of this book is to learn how to solve problems by writing a program . • This book teaches you how to create programs by using the Java programming languages . • Java is the Internet program language • Why Java? The answer is that Java enables user to deploy applications on the Internet for servers , desktop computers , and small hand-held devices . 1.2 What is a Computer? • A computer is an electronic device that stores and processes data. • A computer includes both hardware and software. o Hardware is the physical aspect of the computer that can be seen. o Software is the invisible instructions that control the hardware and make it work. • Computer programming consists of writing instructions for computers to perform. • A computer consists of the following hardware components o CPU (Central Processing Unit) o Memory (Main memory) o Storage Devices (hard disk, floppy disk, CDs) o Input/Output devices (monitor, printer, keyboard, mouse) o Communication devices (Modem, NIC (Network Interface Card)). Bus Storage Communication Input Output Memory CPU Devices Devices Devices Devices e.g., Disk, CD, e.g., Modem, e.g., Keyboard, e.g., Monitor, and Tape and NIC Mouse Printer FIGURE 1.1 A computer consists of a CPU, memory, Hard disk, floppy disk, monitor, printer, and communication devices. CMPS161 Class Notes (Chap 01) Page 1 / 15 Kuo-pao Yang 1.2.1 Central Processing Unit (CPU) • The central processing unit (CPU) is the brain of a computer. • It retrieves instructions from memory and executes them. -
Language Translators
Student Notes Theory LANGUAGE TRANSLATORS A. HIGH AND LOW LEVEL LANGUAGES Programming languages Low – Level Languages High-Level Languages Example: Assembly Language Example: Pascal, Basic, Java Characteristics of LOW Level Languages: They are machine oriented : an assembly language program written for one machine will not work on any other type of machine unless they happen to use the same processor chip. Each assembly language statement generally translates into one machine code instruction, therefore the program becomes long and time-consuming to create. Example: 10100101 01110001 LDA &71 01101001 00000001 ADD #&01 10000101 01110001 STA &71 Characteristics of HIGH Level Languages: They are not machine oriented: in theory they are portable , meaning that a program written for one machine will run on any other machine for which the appropriate compiler or interpreter is available. They are problem oriented: most high level languages have structures and facilities appropriate to a particular use or type of problem. For example, FORTRAN was developed for use in solving mathematical problems. Some languages, such as PASCAL were developed as general-purpose languages. Statements in high-level languages usually resemble English sentences or mathematical expressions and these languages tend to be easier to learn and understand than assembly language. Each statement in a high level language will be translated into several machine code instructions. Example: number:= number + 1; 10100101 01110001 01101001 00000001 10000101 01110001 B. GENERATIONS OF PROGRAMMING LANGUAGES 4th generation 4GLs 3rd generation High Level Languages 2nd generation Low-level Languages 1st generation Machine Code Page 1 of 5 K Aquilina Student Notes Theory 1. MACHINE LANGUAGE – 1ST GENERATION In the early days of computer programming all programs had to be written in machine code. -
Complete Code Generation from UML State Machine
Complete Code Generation from UML State Machine Van Cam Pham, Ansgar Radermacher, Sebastien´ Gerard´ and Shuai Li CEA, LIST, Laboratory of Model Driven Engineering for Embedded Systems, P.C. 174, Gif-sur-Yvette, 91191, France Keywords: UML State Machine, Code Generation, Semantics-conformance, Efficiency, Events, C++. Abstract: An event-driven architecture is a useful way to design and implement complex systems. The UML State Machine and its visualizations are a powerful means to the modeling of the logical behavior of such an archi- tecture. In Model Driven Engineering, executable code can be automatically generated from state machines. However, existing generation approaches and tools from UML State Machines are still limited to simple cases, especially when considering concurrency and pseudo states such as history, junction, and event types. This paper provides a pattern and tool for complete and efficient code generation approach from UML State Ma- chine. It extends IF-ELSE-SWITCH constructions of programming languages with concurrency support. The code generated with our approach has been executed with a set of state-machine examples that are part of a test-suite described in the recent OMG standard Precise Semantics Of State Machine. The traced execution results comply with the standard and are a good hint that the execution is semantically correct. The generated code is also efficient: it supports multi-thread-based concurrency, and the (static and dynamic) efficiency of generated code is improved compared to considered approaches. 1 INTRODUCTION Completeness: Existing tools and approaches mainly focus on the sequential aspect while the concurrency The UML State Machine (USM) (Specification and of state machines is limitedly supported. -
GNAT User's Guide
GNAT User's Guide GNAT, The GNU Ada Compiler For gcc version 4.7.4 (GCC) AdaCore Copyright c 1995-2009 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts and with no Back-Cover Texts. A copy of the license is included in the section entitled \GNU Free Documentation License". About This Guide 1 About This Guide This guide describes the use of GNAT, a compiler and software development toolset for the full Ada programming language. It documents the features of the compiler and tools, and explains how to use them to build Ada applications. GNAT implements Ada 95 and Ada 2005, and it may also be invoked in Ada 83 compat- ibility mode. By default, GNAT assumes Ada 2005, but you can override with a compiler switch (see Section 3.2.9 [Compiling Different Versions of Ada], page 78) to explicitly specify the language version. Throughout this manual, references to \Ada" without a year suffix apply to both the Ada 95 and Ada 2005 versions of the language. What This Guide Contains This guide contains the following chapters: • Chapter 1 [Getting Started with GNAT], page 5, describes how to get started compiling and running Ada programs with the GNAT Ada programming environment. • Chapter 2 [The GNAT Compilation Model], page 13, describes the compilation model used by GNAT. • Chapter 3 [Compiling Using gcc], page 41, describes how to compile Ada programs with gcc, the Ada compiler. -
Dive Into Python 3”
CHAPTER -1. WHAT’S NEW IN “DIVE INTO PYTHON 3” ❝ Isn’t this where we came in? ❞ — Pink Floyd, The Wall -1.1. A.K.A. “THE MINUS LEVEL” Y ou read the original “Dive Into Python” and maybe even bought it on paper. (Thanks!) You already know Python 2 pretty well. You’re ready to take the plunge into Python 3. … If all of that is true, read on. (If none of that is true, you’d be better off starting at the beginning.) Python 3 comes with a script called 2to3. Learn it. Love it. Use it. Porting Code to Python 3 with 2to3 is a reference of all the things that the 2to3 tool can fix automatically. Since a lot of those things are syntax changes, it’s a good starting point to learn about a lot of the syntax changes in Python 3. (print is now a function, `x` doesn’t work, &c.) Case Study: Porting chardet to Python 3 documents my (ultimately successful) effort to port a non-trivial library from Python 2 to Python 3. It may help you; it may not. There’s a fairly steep learning curve, since you need to kind of understand the library first, so you can understand why it broke and how I fixed it. A lot of the breakage centers around strings. Speaking of which… Strings. Whew. Where to start. Python 2 had “strings” and “Unicode strings.” Python 3 has “bytes” and “strings.” That is, all strings are now Unicode strings, and if you want to deal with a bag of bytes, you use the new bytes type. -
Programming with Windows Forms
A P P E N D I X A ■ ■ ■ Programming with Windows Forms Since the release of the .NET platform (circa 2001), the base class libraries have included a particular API named Windows Forms, represented primarily by the System.Windows.Forms.dll assembly. The Windows Forms toolkit provides the types necessary to build desktop graphical user interfaces (GUIs), create custom controls, manage resources (e.g., string tables and icons), and perform other desktop- centric programming tasks. In addition, a separate API named GDI+ (represented by the System.Drawing.dll assembly) provides additional types that allow programmers to generate 2D graphics, interact with networked printers, and manipulate image data. The Windows Forms (and GDI+) APIs remain alive and well within the .NET 4.0 platform, and they will exist within the base class library for quite some time (arguably forever). However, Microsoft has shipped a brand new GUI toolkit called Windows Presentation Foundation (WPF) since the release of .NET 3.0. As you saw in Chapters 27-31, WPF provides a massive amount of horsepower that you can use to build bleeding-edge user interfaces, and it has become the preferred desktop API for today’s .NET graphical user interfaces. The point of this appendix, however, is to provide a tour of the traditional Windows Forms API. One reason it is helpful to understand the original programming model: you can find many existing Windows Forms applications out there that will need to be maintained for some time to come. Also, many desktop GUIs simply might not require the horsepower offered by WPF. -
What Is a Computer Program? 1 High-Level Vs Low-Level Languages
What Is A Computer Program? Scientific Computing Fall, 2019 Paul Gribble 1 High-level vs low-level languages1 2 Interpreted vs compiled languages3 What is a computer program? What is code? What is a computer language? A computer program is simply a series of instructions that the computer executes, one after the other. An instruction is a single command. A program is a series of instructions. Code is another way of referring to a single instruction or a series of instructions (a program). 1 High-level vs low-level languages The CPU (central processing unit) chip(s) that sit on the motherboard of your computer is the piece of hardware that actually executes instructions. A CPU only understands a relatively low-level language called machine code. Often machine code is generated automatically by translating code written in assembly language, which is a low-level programming language that has a relatively direcy relationship to machine code (but is more readable by a human). A utility program called an assembler is what translates assembly language code into machine code. In this course we will be learning how to program in MATLAB, which is a high-level programming language. The “high-level” refers to the fact that the language has a strong abstraction from the details of the computer (the details of the machine code). A “strong abstraction” means that one can operate using high-level instructions without having to worry about the low-level details of carrying out those instructions. An analogy is motor skill learning. A high-level language for human action might be drive your car to the grocery store and buy apples. -
8 C# Development Tools
Object Oriented Programming using C# C# Development Tools 8 C# Development Tools Introduction This chapter will introduce the reader to several development tools that support the development of large scale C# systems. We will also consider the importance of documentation and show tools can be used to generate documentation for systems you create (almost automatically). Objectives By the end of this chapter you will be able to…. • Find details of several professional and free interactive development environments • Understand the importance of the software documentation tools and the value of embedding XML comments within your code. • Write XML comments and generate automatic documentation for your programs. This chapter consists of eight sections :- 1) Tools for Writing C# Programs…. 2) Microsoft Visual Studio 3) SharpDevelop 4) Automatic Documentation 5) Sandcastle Help File Builder 6) GhostDoc 7) Adding Namespace Comments 8) Summary 8.1 Tools for Writing C# Programs Whatever mode of execution is employed (see section 1.7), programmers can work with a variety of tools to create source code. It is possible to write C# programs using simple discrete tools such as a plain text editor (e.g. Notepad) and a separate compiler invoked manually as required. However virtually all programmers would use a powerful Integrated Development Environment (IDE) which use compilers and other standard tools behind a seamless interface. Even more sophisticated tools Computer Aided Software Engineering (CASE) tools exist which integrate the implementation process with other phases of the software development lifecycle. CASE tools could take UML class diagrams, generated as part of the software analysis and design phase, and generate classes and method stubs automatically saving some of the effort required to write the C# code (ie. -
Chapter 1 Basic Principles of Programming Languages
Chapter 1 Basic Principles of Programming Languages Although there exist many programming languages, the differences among them are insignificant compared to the differences among natural languages. In this chapter, we discuss the common aspects shared among different programming languages. These aspects include: programming paradigms that define how computation is expressed; the main features of programming languages and their impact on the performance of programs written in the languages; a brief review of the history and development of programming languages; the lexical, syntactic, and semantic structures of programming languages, data and data types, program processing and preprocessing, and the life cycles of program development. At the end of the chapter, you should have learned: what programming paradigms are; an overview of different programming languages and the background knowledge of these languages; the structures of programming languages and how programming languages are defined at the syntactic level; data types, strong versus weak checking; the relationship between language features and their performances; the processing and preprocessing of programming languages, compilation versus interpretation, and different execution models of macros, procedures, and inline procedures; the steps used for program development: requirement, specification, design, implementation, testing, and the correctness proof of programs. The chapter is organized as follows. Section 1.1 introduces the programming paradigms, performance, features, and the development of programming languages. Section 1.2 outlines the structures and design issues of programming languages. Section 1.3 discusses the typing systems, including types of variables, type equivalence, type conversion, and type checking during the compilation. Section 1.4 presents the preprocessing and processing of programming languages, including macro processing, interpretation, and compilation. -
User's Guide and Reference
IBM Compiler and Library for REXX on IBM Z Version 1 Release 4 User’s Guide and Reference IBM SH19-8160-06 Note Before using this information and the product it supports, be sure to read the general information under Appendix G, “Notices,” on page 267. Seventh Edition, August 2013 This edition applies to version 1 release 4 of IBM Compiler for REXX on IBM Z (product number 5695-013) and the IBM Library for REXX on IBM Z (product number 5695-014), and to all subsequent releases and modifications until otherwise indicated in new editions. This edition replaces SH19-8160-04. © Copyright International Business Machines Corporation 1991, 2013. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents About This Book..................................................................................................xix How to Read the Syntax Notation............................................................................................................. xix How This Book Is Organized..................................................................................................................... xix How to Send Your Comments.................................................................................................................... xx What's New in Release 4..................................................................................... xxi IBM Compiler for REXX on IBM Z..............................................................................................................xxi -
Virtual Machines for Dynamic Languages Ausgewählte Kapitel Der Systemsoftwaretechnik, WS2021
Virtual Machines for Dynamic Languages Ausgewählte Kapitel der Systemsoftwaretechnik, WS2021 Mark Deutel Friedrich-Alexander-University Erlangen-Nürnberg (FAU) Erlangen, Germany [email protected] ABSTRACT threading model. It is common that once a dynamic language has A common approach to execute dynamic languages is inside a vir- grown popular enough the interpreter is extended by a just-in-time tual machine (VM), usually implemented in a low level system (JIT) compiler to more efficiently execute interpreted code. language like C. Such VMs have to support the often complex However this approach does not come without problems. The syntax and semantics of the dynamic languages they are hosting. effort required to write a complete virtual machine from scratch Additionally, some properties of dynamic language code can only is huge. It also forces the language implementer to deal with plat- be inferred at runtime making the optimization of code execution form or target architecture specific details. This makes implement- another challenging task. Therefore, it is hardly possible to provide ing a VM time consuming, error prone, and complicated to port general purpose implementations that support a large range of to other systems. Additionally, modern dynamic languages like different dynamic languages. Furthermore, many commonly used Python, Ruby or JavaScript evolve rapidly and have complex syn- dynamic languages such as Python or Javascript are still evolving tax and semantics. This not only makes it hard to represent the which means that their VMs have to adapt constantly. This implies language properly in low level code, but makes maintenance of that it is necessary to write and maintain a sufficiently elaborated existing VM implementations a complicated task as well.