1<?xml version="1.0" encoding="UTF-8"?> 2 3<!--*********************************************************** 4 * 5 * Licensed to the Apache Software Foundation (ASF) under one 6 * or more contributor license agreements. See the NOTICE file 7 * distributed with this work for additional information 8 * regarding copyright ownership. The ASF licenses this file 9 * to you under the Apache License, Version 2.0 (the 10 * "License"); you may not use this file except in compliance 11 * with the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, 16 * software distributed under the License is distributed on an 17 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 18 * KIND, either express or implied. See the License for the 19 * specific language governing permissions and limitations 20 * under the License. 21 * 22 ***********************************************************--> 23 24<helpdocument version="1.0"> 25<meta> 26<topic id="textsbasicshared03020301xml" indexer="include" status="PUBLISH"> 27<title id="tit" xml-lang="en-US">Eof Function [Runtime]</title> 28<filename>/text/sbasic/shared/03020301.xhp</filename> 29</topic> 30</meta> 31<body> 32<section id="eof"> 33<bookmark xml-lang="en-US" branch="index" id="bm_id3154598"> 34<bookmark_value>Eof function</bookmark_value> 35</bookmark> 36<paragraph role="heading" id="hd_id3154598" xml-lang="en-US" level="1" l10n="U" oldref="1"><link href="text/sbasic/shared/03020301.xhp" name="Eof Function [Runtime]">Eof Function [Runtime]</link></paragraph> 37<paragraph role="paragraph" id="par_id3147182" xml-lang="en-US" l10n="U" oldref="2">Determines if the file pointer has reached the end of a file.</paragraph> 38</section> 39<paragraph role="heading" id="hd_id3149119" xml-lang="en-US" level="2" l10n="U" oldref="3">Syntax:</paragraph> 40<paragraph role="code" id="par_id3147399" xml-lang="en-US" l10n="U" oldref="4">Eof (intexpression As Integer)</paragraph> 41<paragraph role="heading" id="hd_id3153539" xml-lang="en-US" level="2" l10n="U" oldref="5">Return value:</paragraph> 42<paragraph role="paragraph" id="par_id3156027" xml-lang="en-US" l10n="U" oldref="6">Bool</paragraph> 43<paragraph role="heading" id="hd_id3152924" xml-lang="en-US" level="2" l10n="U" oldref="7">Parameters:</paragraph> 44<paragraph role="paragraph" id="par_id3153990" xml-lang="en-US" l10n="U" oldref="8"> 45<emph>Intexpression:</emph> Any integer expression that evaluates to the number of an open file.</paragraph> 46<paragraph role="paragraph" id="par_id3153527" xml-lang="en-US" l10n="U" oldref="9">Use EOF to avoid errors when you attempt to get input past the end of a file. When you use the Input or Get statement to read from a file, the file pointer is advanced by the number of bytes read. When the end of a file is reached, EOF returns the value "True" (-1).</paragraph> 47<embed href="text/sbasic/shared/00000003.xhp#errorcode"/> 48<embed href="text/sbasic/shared/00000003.xhp#err5"/> 49<embed href="text/sbasic/shared/00000003.xhp#err52"/> 50<paragraph role="heading" id="hd_id3154046" xml-lang="en-US" level="2" l10n="U" oldref="10">Example:</paragraph> 51<paragraph role="code" id="par_id3143270" xml-lang="en-US" l10n="U" oldref="11">Sub ExampleWorkWithAFile</paragraph> 52<paragraph role="code" id="par_id3150670" xml-lang="en-US" l10n="U" oldref="12">Dim iNumber As Integer</paragraph> 53<paragraph role="code" id="par_id3154143" xml-lang="en-US" l10n="U" oldref="13">Dim sLine As String</paragraph> 54<paragraph role="code" id="par_id3148943" xml-lang="en-US" l10n="U" oldref="14">Dim aFile As String</paragraph> 55<paragraph role="code" id="par_id3153897" xml-lang="en-US" l10n="U" oldref="37">Dim sMsg as String</paragraph> 56<paragraph role="code" id="par_id3156344" xml-lang="en-US" l10n="U" oldref="15">aFile = "c:\data.txt"</paragraph> 57<paragraph role="code" id="par_id3148663" xml-lang="en-US" l10n="U" oldref="17">iNumber = Freefile</paragraph> 58<paragraph role="code" id="par_id3153379" xml-lang="en-US" l10n="U" oldref="18">Open aFile For Output As #iNumber</paragraph> 59<paragraph role="code" id="par_id3153360" xml-lang="en-US" l10n="U" oldref="19">Print #iNumber, "First line of text"</paragraph> 60<paragraph role="code" id="par_id3148797" xml-lang="en-US" l10n="U" oldref="20">Print #iNumber, "Another line of text"</paragraph> 61<paragraph role="code" id="par_id3154684" xml-lang="en-US" l10n="U" oldref="21">Close #iNumber</paragraph> 62<paragraph role="code" id="par_id3153104" xml-lang="en-US" l10n="U" oldref="25">iNumber = Freefile</paragraph> 63<paragraph role="code" id="par_id3144761" xml-lang="en-US" l10n="U" oldref="26">Open aFile For Input As iNumber</paragraph> 64<paragraph role="code" id="par_id3153193" xml-lang="en-US" l10n="U" oldref="27">While not eof(iNumber)</paragraph> 65<paragraph role="code" id="par_id3158408" xml-lang="en-US" l10n="U" oldref="28">Line Input #iNumber, sLine</paragraph> 66<paragraph role="code" id="par_id3149203" xml-lang="en-US" l10n="U" oldref="29">If sLine <>"" then</paragraph> 67<paragraph role="code" id="par_id3153770" xml-lang="en-US" l10n="U" oldref="30">sMsg = sMsg & sLine & chr(13)</paragraph> 68<paragraph role="code" id="par_id3153367" xml-lang="en-US" l10n="U" oldref="32">end if</paragraph> 69<paragraph role="code" id="par_id3147318" xml-lang="en-US" l10n="U" oldref="33">wend</paragraph> 70<paragraph role="code" id="par_id3152939" xml-lang="en-US" l10n="U" oldref="34">Close #iNumber</paragraph> 71<paragraph role="code" id="par_id3153726" xml-lang="en-US" l10n="U" oldref="38">Msgbox sMsg</paragraph> 72<paragraph role="code" id="par_id3153092" xml-lang="en-US" l10n="U" oldref="35">End Sub</paragraph> 73</body> 74</helpdocument> 75