delphi有没有将字符‘42.23’转成实数的函数啊

谢谢 问题点数：100、回复次数：5Top

1 楼taidy（）回复于 2002-05-27 09:18:03 得分 30

strtofloat()Top

2 楼zswang（伴水清清)(专家门诊清洁工）回复于 2002-05-27 09:18:33 得分 30

StrToFloat()  
  StrToFloatDef()  
  Val()Top

3 楼outer2000（天外流星）回复于 2002-05-27 09:18:54 得分 20

function   StrToFloat(const   S:   string):   Extended;  
   
  Description  
   
  Use   StrToFloat   to   convert   astring,   S,   to   a   floating-point   value.   S   must   consist   of   an   optional   sign   (+   or   -),   a   string   of   digits   with   an   optional   decimal   point,   and   an   optional   mantissa.   The   mantissa   consists   of   'E'   or   'e'   followed   by   an   optional   sign   (+   or   -)   and   a   whole   number.   Leading   and   trailing   blanks   are   ignored.  
   
  The   DecimalSeparator   global   variable   defines   the   character   that   must   be   used   as   a   decimal   point.   Thousand   separators   and   currency   symbols   are   not   allowed   in   the   string.   If   S   doesn't   contain   a   valid   value,   StrToFloat   raises   an   EConvertError   exception.Top

4 楼zxb2001（zxb）回复于 2002-05-27 09:19:11 得分 0

谢谢  
  Top

5 楼shindynj（一路奔走）回复于 2002-05-27 09:24:14 得分 20

function   StrToFloat(const   S:   string):   Extended;  
   
  把一个字符串转换成Float.Top

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