1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
<!DOCTYPE html>
<html lang="en" dir="ltr" class="no-js">
<head>
<meta charset="utf-8" />
<title>nl:read [BASIC 256 - Language Documentation]</title>
<link rel="stylesheet" type="text/css" href="lib/exe/cssc171c1dfe8519125bb40a349172b001a.css"/>
</head>
<body>
<div id="dokuwiki__site"><div id="dokuwiki__top" class="site dokuwiki mode_show tpl_dokuwiki ">
<div id="dokuwiki__header"><div class="pad group">
<div class="headings group">
<h1><a href="start.html" accesskey="h" title="[H]"><img src="lib/tpl/dokuwiki/images/logo.png" width="64" height="64" alt="" /> <span>BASIC 256 - Language Documentation</span></a></h1>
</div>
</div>
<div class="breadcrumbs">
<div class="youarehere"><span class="bchead">You are here: </span><span class="home"><bdi><a href="start.html" class="wikilink1" title="start">start</a></bdi></span> » <bdi><a href="nl_start.html" class="wikilink1" title="nl:start">nl</a></bdi> » <bdi><span class="curid"><a href="nl_read.html" class="wikilink1" title="nl:read">read</a></span></bdi></div>
</div>
<hr class="a11y" />
</div></div>
<div class="wrapper group">
<div id="dokuwiki__content"><div class="pad group">
<div class="pageId"><span>nl:read</span></div>
<div class="page group">
<div id="dw__toc">
<h3 class="toggle">Table of Contents</h3>
<div>
<ul class="toc">
<li class="level2"><div class="li"><a href="nl_read.html#read">Read</a></div>
<ul class="toc">
<li class="level3"><div class="li"><a href="nl_read.html#formaat">Formaat</a></div></li>
<li class="level3"><div class="li"><a href="nl_read.html#beschrijving">Beschrijving</a></div></li>
<li class="level3"><div class="li"><a href="nl_read.html#voorbeeld">Voorbeeld</a></div></li>
<li class="level3"><div class="li"><a href="nl_read.html#zie_ook">Zie ook</a></div></li>
</ul></li>
</ul>
</div>
</div>
<h2 class="sectionedit1" id="read">Read</h2>
<div class="level2">
</div>
<h3 class="sectionedit2" id="formaat">Formaat</h3>
<div class="level3">
<p>
<strong>read</strong><br/>
<strong>read</strong>()<br/>
<strong>read</strong>(<em>bestandsnr</em>)
</p>
</div>
<h3 class="sectionedit3" id="beschrijving">Beschrijving</h3>
<div class="level3">
<p>
Deze functie leest het bestand en geeft een token terug. Een token is een string van karakters die opgeslplitst zijn door een spatie, tab of nieuwe lijn opdracht, je krijgt dus alles in stukjes binnen. Telkens je dus een <em>spatie</em>,<em>tab</em> of <em>nieuwe lijn</em> tegenkomt.
</p>
<p>
Specifieer je geen bestandnummer dan gebruikt de functie bestandnr 0.
</p>
</div>
<h3 class="sectionedit4" id="voorbeeld">Voorbeeld</h3>
<div class="level3">
<pre class="code basic4gl"><span class="br0">(</span><span class="br0">(</span>prorgamma gevonden in <span class="sy0">/</span>home<span class="sy0">/</span>...<span class="sy0">/</span>basic<span class="sy0">/</span>Examples<span class="sy0">/</span>testing<span class="br0">)</span><span class="br0">)</span>
# testlineio.kbs <span class="sy0">-</span> test <span class="kw2">readline</span>, <span class="kw2">writeline</span>, <span class="kw3">and</span> eof
# <span class="nu0">2008</span><span class="sy0">-</span>08<span class="sy0">-</span><span class="nu0">29</span> jmr
open <span class="st0">"foo.txt"</span>
<span class="kw3">reset</span>
<span class="kw3">for</span> l <span class="sy0">=</span> <span class="nu0">1</span> <span class="kw3">to</span> <span class="nu0">8</span>
<span class="kw2">writeline</span> <span class="st0">"Data file line "</span> <span class="sy0">+</span> l <span class="sy0">+</span> <span class="st0">"."</span>
<span class="kw3">next</span> l
l <span class="sy0">=</span> <span class="nu0">0</span>
donext<span class="sy0">:</span>
<span class="kw3">if</span> eof <span class="kw3">then</span> <span class="kw3">goto</span> done
l <span class="sy0">=</span> l <span class="sy0">+</span> <span class="nu0">1</span>
a<span class="sy0">$</span> <span class="sy0">=</span> <span class="kw3">read</span>
<span class="kw2">print</span> <span class="st0">"line "</span> <span class="sy0">+</span> l <span class="sy0">+</span> <span class="st0">"="</span> <span class="sy0">+</span> a<span class="sy0">$</span>
<span class="kw3">goto</span> donext
done<span class="sy0">:</span>
<span class="kw2">print</span> <span class="st0">"total of "</span> <span class="sy0">+</span> l <span class="sy0">+</span> <span class="st0">" lines."</span>
close
<span class="kw3">end</span></pre>
<p>
Dir programma opent eerst Foo.txt, maakt het leeg en schrijft er dan 8 regels in. VErvolgens wordt elke lijn uitgelezen als token in variable a$ en uitgeschreven op het scherm. Dit ziet er dan zo uit:
</p>
<p><a class="folder" href="nl_read.html#folded_1"> Resultaat</a></p><div class="folded hidden" id="folded_1">
<pre class="code">line 1=Data
line 2=file
line 3=line
line 4=1.
line 5=Data
line 6=file
line 7=line
line 8=2.
line 9=Data
line 10=file
line 11=line
line 12=3.
line 13=Data
line 14=file
line 15=line
line 16=4.
line 17=Data
line 18=file
line 19=line
line 20=5.
line 21=Data
line 22=file
line 23=line
line 24=6.
line 25=Data
line 26=file
line 27=line
line 28=7.
line 29=Data
line 30=file
line 31=line
line 32=8.
total of 32 lines.</pre>
</div>
</div>
<h3 class="sectionedit5" id="zie_ook">Zie ook</h3>
<div class="level3">
<p>
<a href="nl_close.html" class="wikilink1" title="nl:close">Close</a>, <a href="nl_eof.html" class="wikilink1" title="nl:eof">Eof</a>, <a href="nl_open.html" class="wikilink1" title="nl:open">Open</a>, <a href="nl_readline.html" class="wikilink1" title="nl:readline">Readline</a>, <a href="nl_reset.html" class="wikilink1" title="nl:reset">Reset</a>, <a href="nl_write.html" class="wikilink1" title="nl:write">Write</a>, <a href="nl_writeline.html" class="wikilink1" title="nl:writeline">Writeline</a>, <a href="nl_exists.html" class="wikilink1" title="nl:exists">Exists</a>, <a href="nl_seek.html" class="wikilink1" title="nl:seek">Seek</a>, <a href="nl_size.html" class="wikilink1" title="nl:size">Size</a>
</p>
<hr />
<p>
<a href="nl_open.html" class="wikilink1" title="nl:open">vorige</a> | <a href="nl_write_and_read.html" class="wikilink1" title="nl:write_and_read">Lezen en schrijven</a> | <a href="nl_readline.html" class="wikilink1" title="nl:readline">volgende</a>
</p>
</div>
<span id="folded_reveal" style="display:none;"></span><span id="folded_hide" style="display:none;"></span>
</div>
<div class="docInfo"><bdi>nl/read.txt</bdi> · Last modified: 2012/02/05 14:17 by <bdi>tlesseliers</bdi></div>
</div></div>
<hr class="a11y" />
</div>
<div id="dokuwiki__footer"><div class="pad">
<div class="license">Except where otherwise noted, content on this wiki is licensed under the following license: <bdi><a href="http://creativecommons.org/licenses/by-sa/3.0/" rel="license" class="urlextern">CC Attribution-Share Alike 3.0 Unported</a></bdi></div>
</div></div>
</div></div>
<div id="screen__mode" class="no"></div>
</body>
</html>
|
