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Extensible Markup Language  |  2003-08-01  |  7.3 KB  |  66 lines
  1. <?xml version="1.0" encoding="utf-8"?>
  2. <html><head><title>GoSub...Return Statement [Runtime]</title><meta name="filename" content="text/sbasic/common/03090301"/><help:css-file-link xmlns:help="http://openoffice.org/2000/help"/><!--The CSS style header method for setting styles--><style type="text/css">
  3.  
  4.         table.Tabelle1{
  5.                 }
  6.         span.Tabelle1A{
  7.                 width:1.499cm;}
  8.         span.Tabelle1B{
  9.                 width:16.498cm;}
  10.         tr.Tabelle11{
  11.                 }
  12.         td.Tabelle1A1{
  13.                 }
  14.         p.P1{
  15.                 }
  16.         span.T1{
  17.                 font-weight:bold;}
  18.         span.fr1{
  19.                 }
  20.         </style></head><body>
  21.   
  22.   
  23.   <help:paragraphinfo state="E" xmlns:help="http://openoffice.org/2000/help"/><help:to-be-embedded Eid="gosubreturn" xmlns:help="http://openoffice.org/2000/help">
  24.   <p class="Head1"><help:paragraphinfo state="U" number="1"/><help:key-word value="GoSub...Return; statement" tag="kw66539_1"/><help:link Id="66539">GoSub...Return Statement [Runtime]</help:link></p>
  25.   <p class="Paragraph"><help:paragraphinfo state="U" number="2"/>Calls a subroutine that is indicated by a label from a subroutine or a function. The statements following the label are executed until the next Return statement. Afterwards, the program continues with the statement that follows the <span style="font-weight:bold;">GoSub </span>statement.</p>
  26.   <help:paragraphinfo state="E"/></help:to-be-embedded>
  27.   <p class="Head2"><help:paragraphinfo state="U" number="3" xmlns:help="http://openoffice.org/2000/help"/>Syntax:</p>
  28.   <p class="Paragraph"><help:paragraphinfo state="U" number="4" xmlns:help="http://openoffice.org/2000/help"/>see Parameters</p>
  29.   <p class="Head2"><help:paragraphinfo state="U" number="5" xmlns:help="http://openoffice.org/2000/help"/>Parameters:</p>
  30.   <p class="Paragraph"><help:paragraphinfo state="U" number="6" xmlns:help="http://openoffice.org/2000/help"/>Sub/Function</p>
  31.   <p class="Paragraph"><help:paragraphinfo state="U" number="7" xmlns:help="http://openoffice.org/2000/help"/>statement block</p>
  32.   <p class="Paragraph"><help:paragraphinfo state="U" number="8" xmlns:help="http://openoffice.org/2000/help"/><help:key-word value="GoSub" tag="kw66539_2" xmlns:help="http://openoffice.org/2000/help"/>GoSub Label</p>
  33.   <p class="Paragraph"><help:paragraphinfo state="U" number="9" xmlns:help="http://openoffice.org/2000/help"/>statement block</p>
  34.   <p class="Paragraph"><help:paragraphinfo state="U" number="10" xmlns:help="http://openoffice.org/2000/help"/>GoSub Label</p>
  35.   <p class="Paragraph"><help:paragraphinfo state="U" number="11" xmlns:help="http://openoffice.org/2000/help"/>Exit Sub/Function</p>
  36.   <p class="Paragraph"><help:paragraphinfo state="U" number="12" xmlns:help="http://openoffice.org/2000/help"/>Label:</p>
  37.   <p class="Paragraph"><help:paragraphinfo state="U" number="13" xmlns:help="http://openoffice.org/2000/help"/>statement block</p>
  38.   <p class="Paragraph"><help:paragraphinfo state="U" number="14" xmlns:help="http://openoffice.org/2000/help"/>Return</p>
  39.   <p class="Paragraph"><help:paragraphinfo state="U" number="15" xmlns:help="http://openoffice.org/2000/help"/>End Sub/Function</p>
  40.   <p class="Paragraph"><help:paragraphinfo state="U" number="16" xmlns:help="http://openoffice.org/2000/help"/>The <span class="T1">GoSub</span> statement calls a local subroutine indicated by a label from within a subroutine or a function. The name of the label must end with a colon (":").</p>
  41.   <table><tr class="Tabelle11"><th class="Tabelle1A1" style="text-align:left;"><span class="Tabelle1A">
  42.       <p class="TextInTable"><draw:image draw:name="Icon0" svg:desc="This icon marks text containing important information on data and system security." svg:pixelx="32" svg:pixely="32" svg:width="0.847cm" svg:height="0.847cm" xlink:href="65640" draw:filter-name="" xmlns:draw="http://openoffice.org/2000/drawing" xmlns:svg="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"/></p>
  43.  
  44.      </span></th><th class="Tabelle1A1" style="text-align:left;"><span class="Tabelle1B">
  45.       <p class="TextInTable"><help:paragraphinfo state="U" number="17" xmlns:help="http://openoffice.org/2000/help"/>If the program encounters a Return statement not preceded by <span class="T1">GoSub</span>, <help:productname xmlns:help="http://openoffice.org/2000/help">%PRODUCTNAME</help:productname> Basic returns an error message. Use <span class="T1"><text:s text:c="" xmlns:text="http://openoffice.org/2000/text"/>Exit Sub</span> or <span class="T1">Exit Function</span> to ensure that the program leaves a Sub or Function before reaching the next Return statement.</p>
  46.      </span></th></tr></table>
  47.   <p class="Paragraph"><help:paragraphinfo state="U" number="19" xmlns:help="http://openoffice.org/2000/help"/>The following example demonstrates the use of <span class="T1">GoSub</span> and <span class="T1">Return</span>. By executing a program section twice, the program calculates the square root of two numbers that are entered by the user.</p>
  48.   <p class="Head2"><help:paragraphinfo state="U" number="20" xmlns:help="http://openoffice.org/2000/help"/>Example:</p>
  49.   <p class="PropText"><help:paragraphinfo state="U" number="21" xmlns:help="http://openoffice.org/2000/help"/>Sub ExampleGoSub</p>
  50.   <p class="PropText"><help:paragraphinfo state="U" number="22" xmlns:help="http://openoffice.org/2000/help"/>dim iInputa as Single</p>
  51.   <p class="PropText"><help:paragraphinfo state="U" number="23" xmlns:help="http://openoffice.org/2000/help"/>dim iInputb as Single</p>
  52.   <p class="PropText"><help:paragraphinfo state="U" number="24" xmlns:help="http://openoffice.org/2000/help"/>dim iInputc as Single</p>
  53.   <p class="PropText"><help:paragraphinfo state="U" number="25" xmlns:help="http://openoffice.org/2000/help"/>iInputa = Int(InputBox$ "Enter the first number: ","NumberInput"))</p>
  54.   <p class="PropText"><help:paragraphinfo state="U" number="26" xmlns:help="http://openoffice.org/2000/help"/>iInputb = Int(InputBox$ "Enter the second number: ","NumberInput"))</p>
  55.   <p class="PropText"><help:paragraphinfo state="U" number="27" xmlns:help="http://openoffice.org/2000/help"/>iInputc=iInputa</p>
  56.   <p class="PropText"><help:paragraphinfo state="U" number="28" xmlns:help="http://openoffice.org/2000/help"/>GoSub SquareRoot</p>
  57.   <p class="PropText"><help:paragraphinfo state="U" number="29" xmlns:help="http://openoffice.org/2000/help"/>Print "The square root of";iInputa;" is";iInputc</p>
  58.   <p class="PropText"><help:paragraphinfo state="U" number="30" xmlns:help="http://openoffice.org/2000/help"/>iInputc=iInputb</p>
  59.   <p class="PropText"><help:paragraphinfo state="U" number="31" xmlns:help="http://openoffice.org/2000/help"/>GoSub SquareRoot</p>
  60.   <p class="PropText"><help:paragraphinfo state="U" number="32" xmlns:help="http://openoffice.org/2000/help"/>Print "The square root of";iInputb;" is";iInputc</p>
  61.   <p class="PropText"><help:paragraphinfo state="U" number="33" xmlns:help="http://openoffice.org/2000/help"/>Exit Sub</p>
  62.   <p class="PropText"><help:paragraphinfo state="U" number="34" xmlns:help="http://openoffice.org/2000/help"/>SquareRoot:</p>
  63.   <p class="PropText"><help:paragraphinfo state="U" number="35" xmlns:help="http://openoffice.org/2000/help"/>iInputc=sqr(iInputc)</p>
  64.   <p class="PropText"><help:paragraphinfo state="U" number="36" xmlns:help="http://openoffice.org/2000/help"/>Return</p>
  65.   <p class="PropText"><help:paragraphinfo state="U" number="37" xmlns:help="http://openoffice.org/2000/help"/>End Sub</p>
  66.  </body></html>