Programming languages​​

Ngôn ngữ lập trình (programming language): Là một hệ thống các kí hiệu tuân theo các quy ước về ngữ pháp và ngữ nghĩa, dùng để xây dựng các chương trình cho máy tính. Ngữ pháp (syntax): Quy ước về quan hệ giữa các ký hiệu. Ví dụ trong ngôn ngữ Pascal: các ký hiệu Begin, end phảI đi thành từng cặp, sau if sẽ là một biểu thức điều kiện, sau đó là kí hiệu then. Ngữ nghĩa (sematics): Quy ước về ý nghĩa của kí hiệu. Ví dụ trong ngôn ngữ Pascal: dấu + biểu thị cho phép...

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What is ASP? – Server-side scripting technology – Files containing HTML and scripting code – Access via HTTP requests – Scripting code is interpreted on server side • What can I do with ASP? – Easily and quickly create simple Web applications – Generate dynamic Web content – Client-side scripting for validation – Access COM components to extend functionality

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A formal language: Is an abstraction of the general characteristics of programming languages. Consists of a set of symbols and some formation rules by which these symbols can be combined into sentences. Accepts input, produces output, may have some temporary storage, and can make decisions in transforming the input into the output.

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VHDL (VHSIC Hardware Description Language) is a language for describing hardware. Its requirement emerged during the VHSIC development program of the US Department of Defense. The department organized a work shop in 1981 to lay down the specifications of a language which could describe hardware at various levels of abstractions, could generate test signals and record responses, and could act as a medium of information exchange between the chip foundries and the CAD tool operators.

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In its role as a high level assembler used for writing operating systems, C is often used to access memory locations and change individual bits. You might for example need to access individual bits in an int. It can sometimes be useful to conserve memory by using a byte to hold 8 flags though with an abundance of ram it's common to just use one byte per flag or even one per int. Knowing how to extract or alter individual bits is still worthwhile knowing; you may never have to use it but when you have to maintain code that...

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Phân biệt sự khác nhau giữa Câu lệnh, Chương trình và Phần mềm, Biết cách viết, biên dịch và chạy một chương tình C đơn giản.Ngôn ngữ lập trình (tiếng Anh: programming language) là một tập con của ngôn ngữ máy tính. Đây là một dạng ngôn ngữ được chuẩn hóa (đối lập với ngôn ngữ tự nhiên). Nó được dùng để miêu tả những quá trình, những ngữ cảnh một cách rất chi tiết.

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Chương trình máy tính là một tập hợp các câu lệnh hướng dẫn máy tính làm một số việc nhất định Programming language: ngôn ngữ lập trình. Có rất nhiều ngôn ngữ lập trình. Compiler: Trình biên dịch, là phần mềm chịu trách nhiệm dịch chương trình viết bằng ngôn ngữ lập trình sang mã máy

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Outline Objects and Classes OOP Concepts Encapsulation Aggregation/Composition Inheritance & Polymorphism Some useful Java classes Exception Handling, I/O Readings & Exercise Discussion .

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Client's Functions Handle the user interface. Translate the user's request into the desired protocol. Send the request to the server. Wait for the server's response. Translate the response into "human-readable" results. Present the results to the user. Listen for a client's query. Process that query. Return the results back to the client.

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Identifiers: Names for the things you will refer to in your programs Used for programming entities as variables, constants, methods, classes, and packages Rules for naming identifiers: A sequence of characters that consists of letters, digits, underscores (_), and dollar signs ($). Cannot start with a digit. Cannot be a reserved word. Cannot be true, false, or null. An identifier can be of any length. .Variables & Constants Variables: used to store data in a program datatype variableName; datatype variable1, variable2, ..., variablen; Constants Represents permanent data...

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Mechanism to create new classes using existing classes The existing class is called the parent class, or superclass, or base class The derived class is called the child class or subclass As the name implies, the child inherits characteristics of the parent That is, the child class inherits the methods and data defined by the parent class. Once a behavior (method) is defined in a super class, that behavior is automatically inherited by all subclasses

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At the end of the lesson, the student should be able to: Describe the features of Java technology Describe the different phases of a Java program. Java was created in 1991 by James Gosling et al. of Sun Microsystems. Initially called Oak, in honor of the tree outside Gosling's window, its name was changed to Java because there was already a language called Oak.

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Contents Client-side dynamic pages JavaScript .Client-side dynamic pages Web page contains programs (script) that will be executed in the client side by browser. Script improve the interaction of users and web page (than HTML) Program is written by different scripting technologies Javascript: Vbscript Flash Applet Ajax … .Javascript, VBscript Javascript: An interpreted programming, a script language from Netscape. Syntax similar to Java but it is not Java Easier and faster to code in than the more structured and compiled languages such as C and C++.

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Real world concepts can be modeled in a computer program The program is made of objects with certain properties and operations that the objects can perform It is not important how an object is implemented, but what it does Every object is responsible for carrying out a set of related tasks. A class can contain data declarations and method declarations

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Describe the necessity and the advantage of the framework Develop the Web application by using the framework. Struts: The Apache Software Foundation JSF (JavaServer Faces): The Java Community Process(JCP) Webcoordinator: FUJITSU Ltd.Framework to develop the Web app. by using Servlet and JSP. Starts according to the request from a client Offers the mechanism to process request, storage of data, screen transition control, etc. Defines screen transition information in XML file (strutsconfig. xml)...

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Direct start from Web browser: input directly URL of JSP page into Web browser http://servername:8080/JSP/HelloWorld.jsp Start by “Action” attribute of Form tag Start when you push the summitting button on form Start from JSP (or Servlet) : Start by being specified with other JSP files

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The servlet is constructed, then initialized with the init method. Any calls from clients to the service method are handled. The servlet is taken out of service, then destroyed with the destroy method, then garbage collected and finalized.GenericServlet implements the Servlet and ServletConfig interfaces. It provides simple versions of the lifecycle methods init and destroy and of the methods in the ServletConfig interface.

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provide request information for HTTP servlets. The servlet container creates an HttpServletRequest object and passes it as an argument to the servlet's service methods (doGet, doPost, etc).Client request information including : parameter name and values, and an input stream Attributes : custom information about a request. Extends the ServletRequest interface Returns the value of attribute : public Object getAttribute(String name)

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Language Lap trinh JAVA Java is the language programming direction objects (as C + +) do Sun Microsystem output to the first hex niên 90 the ky 20. Program Việt using Java can be running on any hệ system that have installed your virtual Java (JVM - Java Virtual Machine). Máy virtual Java (JVM - Java Virtual Machine): One programs write by Java will be compile ra mã of the virtual Java (mã java bytecode)

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Một nnlt là 1 hệ thống các ký hiệu dùng để liên lạc , trao đổi 1 nhiệm vụ/ thuật toán với máy tính, làm cho nhiệm vụ được thực thi. Nhiệm vụ được thực thi gọi là một computation, nó tuân thủ một độ chính xác và những quy tắc nhất quán. Với mỗi ngôn ngữ lập trình, ta cần nắm bắt, thấu hiểu những gì ?: Có 3 thành phần căn bản của bất cứ 1 NNLT nào. Mô hình ngôn ngữ-Language paradigm là những nguyên tắc chung cơ bản, dùng bởi LTV để xd chương trình....

68p ginji123 12-08-2012 104 31   Download