tailieunhanh - Giáo trình hướng dẫn phân tích cấu tạo và công dụng của máy in theo catridge p7

Tham khảo tài liệu 'giáo trình hướng dẫn phân tích cấu tạo và công dụng của máy in theo catridge p7', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Ads Easy to write Easy to understand Known the processing data in CPU Prog writing is shortset - Dis Must be complier The time of running prog is longer than machine language 3. High level language - HLL was developed in order to further easy the work of programmers by making the programming language more procedure oriented - Features The statements of HLL are closer to natural english or other natural language A HLL source program must be translated into machine code by means of a compiler or an interpreter - Ads Easy to wirte Easy to understand May be used for everybody Closed to natural languages english language - Dis Must be interpreter by compiler or an interpreter before processing by the computer The prog is long The time to run the prog is longer than low level language Question 2. Some High Level Languages HLL 1. COBOL Common Business Oriented Language - COBOL is an exetensively used HLL and since around 1960 several versions have appeared - The original intention was that COBOL should be capable of being compiled and run on any model of computer - COBOL is now employed for many business data processing applications and so a brief explaination of its structure follows - A COBOL program consists of 4 divisions Identifycation division this identifies the prog Enviroment division specifies the computer to be used for compiling and processing Data division specifies the format and relates to these to the names used in the procedure division Procedure division comprises the statements in the source program this is the main part of a COBOL program 2. BASIC Beginners ALL purpose Symbolic Instruction Code - BASIC is a straightforward HLL intended for use in a time-sharing environment in this respect it is particularly beneficial in educational institutions - One of the difficulties with BASIC is the welter of dialects currently in use - Essentially BASIC consists of statements made up of verbs variables. The verbs are similar to those in COBOL but there is a .