http://wiki.signature.net/index.php?action=history&feed=atom&title=IB_Statements%2Ftestbit 2026-04-20T10:22:54Z Revision history for this page on the wiki MediaWiki 1.16.0 http://wiki.signature.net/index.php?title=IB_Statements/testbit&diff=417&oldid=prev 2009-05-22T10:32:49Z

<p>New page: &#39;&#39;&#39;TESTBIT function&#39;&#39;&#39; &#39;&#39;&#39;Discussion:&#39;&#39;&#39; The TESTBIT function returns the value of a specified bit in a string expression. &#39;&#39;&#39;Syntax:&#39;&#39;&#39; Result = TESTBIT(string-expression, bit-loca...</p> <p><b>New page</b></p><div>'''TESTBIT function''' <br /> <br /> '''Discussion:''' The TESTBIT function returns the value of a specified bit in a string expression. <br /> <br /> '''Syntax:''' Result = TESTBIT(string-expression, bit-location [,EXCP=label])<br /> <br /> Where:<br /> <br /> Result is the value (0 or 1) of the bit at the specified bit-location.<br /> <br /> String-expression is a string value encoded in binary form.<br /> <br /> Bit-location is a numeric value specifying the bit that is to be set.<br /> <br /> Bits are 0-based and are ordered according to the following scheme:<br /> <br /> If the string-expression contains 8 bits, they are ordered:<br /> <br /> 7 6 5 4 3 2 1 0<br /> <br /> If the string-expression contains 16 bits, they are ordered:<br /> <br /> 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8<br /> <br /> If the string-expression contains 24 bits, they are ordered:<br /> <br /> 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 23 22 21 20 19 18 17 16<br /> <br /> An exception occurs if the program attempts to test a bit beyond the declared length of the string-expression. <br /> <br /> '''Example:'''<br /> A$ = “@7FA5@”<br /> !<br /> FOR I = 0 TO 15<br /> Result = TESTBIT(A$,I,EXCP=9999)<br /> Print “Bit”;I;”is”;Result<br /> NEXT I</div>

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