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47 lines
1.1 KiB
Plaintext
47 lines
1.1 KiB
Plaintext
/*
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* Author....: Gary Baren
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* CIS ID....: 75470,1027
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*
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* This is an original work by Gary Baren and is hereby placed in the
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* public domain.
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*
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* Modification history:
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* ---------------------
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*
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* Rev 1.2 15 Aug 1991 23:05:02 GLENN
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* Forest Belt proofread/edited/cleaned up doc
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*
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* Rev 1.1 14 Jun 1991 19:51:24 GLENN
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* Minor edit to file header
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*
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* Rev 1.0 09 Jun 1991 00:27:06 GLENN
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* Initial revision.
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*
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*/
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#define _LOG10( num ) ( Log( num ) / Log( 10 ) )
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#define DEFAULT_PRECISION 6
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FUNCTION ft_D2E( nDec, nPrecision )
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LOCAL nExp
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__defaultNIL( @nPrecision, DEFAULT_PRECISION )
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IF nDec == 0
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nExp := 0
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ELSEIF Abs( nDec ) < 1
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nExp := Int( _LOG10( nDec ) ) - 1
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ELSE
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nExp := Int( _LOG10( Abs( nDec ) + 0.00001 ) ) /* 0.00001 == kludge */
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ENDIF /* for imprecise logs */
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nDec /= 10 ^ nExp
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IF Round( Abs( nDec ), nPrecision ) >= 10
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nDec /= 10
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nExp++
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ENDIF // another kludge FOR stuff LIKE "999999999"
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RETURN LTrim( Str( nDec, nPrecision + 3, nPrecision ) ) + "E" + hb_ntos( nExp )
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