69 lines
5.4 KiB
Plaintext
69 lines
5.4 KiB
Plaintext
/*
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* File......: E2D.PRG
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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 23:03:28 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 19:51:40 GLENN
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* Minor edit to file header
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*
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* Rev 1.0 07 Jun 1991 23:03:32 GLENN
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* Initial revision.
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*
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*/
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/* $DOC$
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* $FUNCNAME$
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* FT_E2D()
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* $CATEGORY$
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* Conversion
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* $ONELINER$
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* Convert scientific notation string to a decimal
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* $SYNTAX$
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* FT_E2D( <cNumE> ) -> <nDec>
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* $ARGUMENTS$
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* <cNumE> Scientific notation string to convert
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* $RETURNS$
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* <nDec> Decimal number
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* $DESCRIPTION$
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* Given a string in the format x.yEz, the decimal
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* equivalent is returned.
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* $EXAMPLES$
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* ? FT_E2D( "1.23E1" )
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* -> 12.3
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*
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* ? FT_E2D( "-1.235E1" )
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* -> -12.35
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*
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* ? ft_d2e( "5.43E-6" )
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* -> 0.0000543
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* $SEEALSO$
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* FT_D2E()
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* $END$
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*/
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#ifdef FT_TEST
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function main( sNumE )
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return qout( FT_E2D( sNumE ) )
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#endif
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function ft_e2d( sNumE )
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local nMant, nExp
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nMant := val( left( sNumE, at( 'E', sNumE ) - 1 ) )
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nExp := val(substr( sNumE, ;
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at( 'E', sNumE ) + 1, ;
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len( sNumE ) - at( 'E', sNumE ) ;
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) ;
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)
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return( nMant * 10 ^ nExp )
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