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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