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Extensible Markup Language  |  2001-09-07  |  2.2 KB  |  34 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"/><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.         span.T1{
  7.                 font-weight:bold;}
  8.         </style></head><body>
  9.   
  10.   
  11.   <help:to-be-embedded Eid="eqv" xmlns:help="http://openoffice.org/2000/help">
  12.   <p class="Head1"><a name="eqv"/><help:link Id="66529">Eqv-Operator [Runtime]</help:link></p>
  13.   <p class="Paragraph">Calculates a logic equivalence on two expressions.</p>
  14.   </help:to-be-embedded>
  15.   <p class="Paragraph"><span class="T1">Syntax</span>:</p>
  16.   <p class="Paragraph">Result = Expression1 Eqv Expression2 <help:key-word value="Eqv" tag="kw66529_1" xmlns:help="http://openoffice.org/2000/help"/></p>
  17.   <p class="Paragraph"><span class="T1">Parameter</span>:</p>
  18.   <p class="Paragraph">Result: Any numeric variable containing the result of the comparison.</p>
  19.   <p class="Paragraph">Expression1, expression2 : Any expressions to be compared.</p>
  20.   <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>
  21.   <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>
  22.   <p class="Paragraph"><span class="T1">Example:</span></p>
  23.   <p class="PropText">Sub ExampleEqv</p>
  24.   <p class="PropText">Dim vA as Variant, vB as Variant, vC as Variant, vD as Variant</p>
  25.   <p class="PropText">Dim vOut as Variant</p>
  26.   <p class="PropText">vA = 10: vB = 8: vC = 6: vD = Null</p>
  27.   <p class="PropText">vOut = A > B Eqv B > C REM returns -1</p>
  28.   <p class="PropText">vOut = B > A Eqv B > C REM returns -1</p>
  29.   <p class="PropText">vOut = A > B Eqv B > D REM returns -1</p>
  30.   <p class="PropText">vOut = (B > D Eqv B > A) REM returns 0</p>
  31.   <p class="PropText">vOut = B Eqv A REM returns -1</p>
  32.   <p class="PropText">End Sub</p>
  33.   <p class="PropText"/>
  34.  </body></html>