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Extensible Markup Language  |  2002-01-24  |  2.5 KB  |  36 lines
  1. <?xml version="1.0" encoding="utf-8"?>
  2. <html><head><title>Eqv-Operator [Runtime]</title><meta name="filename" content="text/sbasic/common/03060200"/><meta name="language" content="en-US"/><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.         p.P1{
  5.                 }
  6.         p.P2{
  7.                 }
  8.         span.T1{
  9.                 font-weight:bold;}
  10.         </style></head><body>
  11.   
  12.   
  13.   <help:to-be-embedded Eid="eqv" xmlns:help="http://openoffice.org/2000/help">
  14.   <p class="Head1"><a name="eqv"/><help:link Id="66529">Eqv-Operator [Runtime]</help:link></p>
  15.   <p class="Paragraph">Calculates a logic equivalence on two expressions.</p>
  16.   </help:to-be-embedded>
  17.   <p class="Paragraph"><span class="T1">Syntax</span>:</p>
  18.   <p class="Paragraph">Result = Expression1 Eqv Expression2 <help:key-word value="Eqv" tag="kw66529_1" xmlns:help="http://openoffice.org/2000/help"/></p>
  19.   <p class="Paragraph"><span class="T1">Parameter</span>:</p>
  20.   <p class="Paragraph">Result: Any numeric variable containing the result of the comparison.</p>
  21.   <p class="Paragraph">Expression1, expression2 : Any expressions to be compared.</p>
  22.   <p class="Paragraph">When testing for equivalence between boolean expressions, the result is <span class="T1">True</span> if either both expressions are <span class="T1">True</span> or both are <span class="T1">False</span>.</p>
  23.   <p class="Paragraph">In a bit-wise comparison, the Eqv operator sets the corresponding bit in the result only if a bit is set in both expressions, or neither expression.</p>
  24.   <p class="P2">Example:</p>
  25.   <p class="PropText">Sub ExampleEqv</p>
  26.   <p class="PropText">Dim vA as Variant, vB as Variant, vC as Variant, vD as Variant</p>
  27.   <p class="PropText">Dim vOut as Variant</p>
  28.   <p class="PropText">vA = 10: vB = 8: vC = 6: vD = Null</p>
  29.   <p class="PropText">vOut = A > B Eqv B > C <text:s text:c="2" xmlns:text="http://openoffice.org/2000/text"/>REM returns -1</p>
  30.   <p class="PropText">vOut = B > A Eqv B > C <text:s text:c="2" xmlns:text="http://openoffice.org/2000/text"/>REM returns -1</p>
  31.   <p class="PropText">vOut = A > B Eqv B > D <text:s text:c="2" xmlns:text="http://openoffice.org/2000/text"/>REM returns -1</p>
  32.   <p class="PropText">vOut = (B > D Eqv B > A) REM returns 0</p>
  33.   <p class="PropText">vOut = B Eqv A <text:s text:c="10" xmlns:text="http://openoffice.org/2000/text"/>REM returns -1</p>
  34.   <p class="PropText">End Sub</p>
  35.   <p class="PropText"/>
  36.  </body></html>