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ABC    
基本知识,英语字母表;火车时刻表

基本知识,英语字母表;火车时刻表

ABC
n 1: the elementary stages of any subject (usually plural); "he
mastered only the rudiments of geometry" [synonym: {rudiment},
{first rudiment}, {first principle}, {alphabet}, {ABC},
{ABC's}, {ABCs}]

1. {Atanasoff-Berry Computer}.

2. An {imperative language} and programming
environment from {CWI}, Netherlands. It is interactive,
structured, high-level, and easy to learn and use. It is a
general-purpose language which you might use instead of
{BASIC}, {Pascal} or {AWK}. It is not a systems-programming
language but is good for teaching or prototyping.

ABC has only five data types that can easily be combined;
{strong typing}, yet without declarations; data limited only
by memory; refinements to support top-down programming;
nesting by indentation. Programs are typically around a
quarter the size of the equivalent {Pascal} or {C} program,
and more readable.

ABC includes a programming environment with {syntax-directed}
editing, {suggestions}, {persistent variables} and multiple
workspaces and {infinite precision} arithmetic.

An example function words 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

{Interpreter}/{compiler}, version 1.04.01, by Leo Geurts,
Lambert Meertens, Steven Pemberton .
ABC has been ported to {Unix}, {MS-DOS}, {Atari}, {Macintosh}.

{(http://cwi.nl/cwi/projects/abc.html)}.

{FTP eu.net (ftp://ftp.eu.net/programming/languages/abc)},
{FTP nluug.nl (ftp://ftp.nluug.nl/programming/languages/abc)},
{FTP uunet (ftp://ftp.uu.net/languages/abc)}.

Mailing list: .

E-mail: .

["The ABC Programmer's Handbook" by Leo Geurts, Lambert
Meertens and Steven Pemberton, published by Prentice-Hall
(ISBN 0-13-000027-2)].

["An Alternative Simple Language and Environment for PCs" by
Steven Pemberton, IEEE Software, Vol. 4, No. 1, January 1987,
pp. 56-64.]

(1995-02-09)

2. Argument, Basic value, C?.

An {abstract machine} for implementation of {functional
languages} and its intermediate code.

[P. Koopman, "Functional Programs as Executable
Specifications", 1990].

(1995-02-09)

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