Английская Википедия:ABC (programming language)
Шаблон:Short description Шаблон:Infobox programming language
ABC is an imperative general-purpose programming language and integrated development environment (IDE) developed at Centrum Wiskunde & Informatica (CWI), Netherlands by Leo Geurts, Lambert Meertens, and Steven Pemberton.[1] It is interactive, structured, high-level, and intended to be used instead of BASIC, Pascal, or AWK. It is intended for teaching or prototyping, but not as a systems-programming language.
ABC had a major influence on the design of the language Python, developed by Guido van Rossum, who formerly worked for several years on the ABC system in the mid-1980s.[2][3]
Features
Its designers claim that ABC programs are typically around a quarter the size of the equivalent Pascal or C programs, and more readable.[4] Key features include:
- Only five basic data types
- No required variable declarations
- Explicit support for top-down programming
- Statement nesting is indicated by indentation, via the off-side rule
- Infinite precision arithmetic, unlimited-sized lists and strings, and other features supporting orthogonality and ease of use by novices
ABC was originally a monolithic implementation, leading to an inability to adapt to new requirements, such as creating a graphical user interface (GUI). ABC could not directly access the underlying file system and operating system.
The full ABC system includes a programming environment with a structure editor (syntax-directed editor), suggestions, static variables (persistent), and multiple workspaces, and is available as an interpreter–compiler. Шаблон:As of, the latest version is 1.05.02, and it is ported to Unix, DOS, Atari, and Apple MacOS.
Example
An example function to collect the set of all words
in a document:
HOW TO RETURN words document: PUT {} IN collection FOR line IN document: FOR word IN split line: IF word not.in collection: INSERT word IN collection RETURN collection
References
External links
- Английская Википедия
- Computer science in the Netherlands
- Dutch inventions
- Educational programming languages
- Information technology in the Netherlands
- Persistent programming languages
- Procedural programming languages
- Programming languages created in the 1980s
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии