Files
harbour-core/harbour/contrib/libnf/e2d.prg
Przemyslaw Czerpak 8db4f58efb 2007-08-08 15:20 UTC+0200 Przemyslaw Czerpak (druzus/at/priv.onet.pl)
* harbour/contrib/libnf/at2.prg
  * harbour/contrib/libnf/min2dhm.prg
  * harbour/contrib/libnf/ontick.c
  * harbour/contrib/libnf/sqzn.prg
  * harbour/contrib/libnf/bytexor.prg
  * harbour/contrib/libnf/asum.prg
  * harbour/contrib/libnf/sleep.prg
  * harbour/contrib/libnf/any2any.prg
  * harbour/contrib/libnf/origin.c
  * harbour/contrib/libnf/mouse.c
  * harbour/contrib/libnf/stod.c
  * harbour/contrib/libnf/vertmenu.prg
  * harbour/contrib/libnf/aredit.prg
  * harbour/contrib/libnf/n2color.c
  * harbour/contrib/libnf/xbox.prg
  * harbour/contrib/libnf/hex2dec.prg
  * harbour/contrib/libnf/getver.c
  * harbour/contrib/libnf/Makefile
  * harbour/contrib/libnf/invclr.prg
  * harbour/contrib/libnf/popadder.prg
  * harbour/contrib/libnf/d2e.prg
  * harbour/contrib/libnf/anomatch.prg
  * harbour/contrib/libnf/color2n.c
  * harbour/contrib/libnf/datecnfg.prg
  * harbour/contrib/libnf/easter.prg
  * harbour/contrib/libnf/ntow.prg
  * harbour/contrib/libnf/floptst.prg
  * harbour/contrib/libnf/pchr.prg
  * harbour/contrib/libnf/tbwhile.prg
  * harbour/contrib/libnf/e2d.prg
  * harbour/contrib/libnf/sysmem.prg
  * harbour/contrib/libnf/dfile.prg
  * harbour/contrib/libnf/clrsel.prg
  + harbour/contrib/libnf/fttext.c
  + harbour/contrib/libnf/putkey.c
    * basic cleanup and syncing with some of xHarbour fixes and extensions.
      I'd like to ask Windows users to update non GNU make file

  * harbour/source/pp/ppcore.c
    + added support for .T., .F., .Y., .N. in PP and #IF ... / #ELIF ...
      expressions. It was reported by Nick Van Dyck on xHarbour devel list
      that old PP supported it. I haven't known that old PP suported .T.
      and .F. in #IF directive. Please not that there are other diferences
      between new PP and the old one in expresions which can be used in
      #IF ... / #ELIF directives. New PP supports C like expressions with
      support for pseudo functions like defined(), operates on integer
      numbers only to not damage 64bit values during conversion to double
      and keep C compatible results (the old one used double values) and
      is much more restrictive in checking for valid expression.
2007-08-08 13:21:15 +00:00

69 lines
1.5 KiB
Plaintext

/*
* File......: E2D.PRG
* Author....: Gary Baren
* CIS ID....: 75470,1027
*
* This is an original work by Gary Baren and is hereby placed in the
* public domain.
*
* Modification history:
* ---------------------
*
* Rev 1.2 15 Aug 1991 23:03:28 GLENN
* Forest Belt proofread/edited/cleaned up doc
*
* Rev 1.1 14 Jun 1991 19:51:40 GLENN
* Minor edit to file header
*
* Rev 1.0 07 Jun 1991 23:03:32 GLENN
* Initial revision.
*
*/
/* $DOC$
* $FUNCNAME$
* FT_E2D()
* $CATEGORY$
* Conversion
* $ONELINER$
* Convert scientific notation string to a decimal
* $SYNTAX$
* FT_E2D( <cNumE> ) -> <nDec>
* $ARGUMENTS$
* <cNumE> Scientific notation string to convert
* $RETURNS$
* <nDec> Decimal number
* $DESCRIPTION$
* Given a string in the format x.yEz, the decimal
* equivalent is returned.
* $EXAMPLES$
* ? FT_E2D( "1.23E1" )
* -> 12.3
*
* ? FT_E2D( "-1.235E1" )
* -> -12.35
*
* ? ft_d2e( "5.43E-6" )
* -> 0.0000543
* $SEEALSO$
* FT_D2E()
* $END$
*/
#ifdef FT_TEST
function main( sNumE )
return qout( FT_E2D( sNumE ) )
#endif
function ft_e2d( sNumE )
local nMant, nExp
nMant := val( left( sNumE, at( 'E', sNumE ) - 1 ) )
nExp := val(substr( sNumE, ;
at( 'E', sNumE ) + 1, ;
len( sNumE ) - at( 'E', sNumE ) ;
) ;
)
return( nMant * 10 ^ nExp )