如何转换为小数

[fenglily]

4.849753E-01
5.690675E+00
这样写表示什么？？

我有一个文本文件，里面都是象上面那样的数，我想把它转换为小数的形式 （不要带E的这种）
应如何转换

[小呆之家]

var
d:double;
begin
d:=strtofloat('4.849753E-01');
showmessage(floattostr(d));
end;

[天涯倦客]

4.849753E-01 e表示科学记数法。。 （初中数学讲的好像）。。

[fenglily]

dinglinger
这样就可以了啊
但是对的 不太明白 给你分了啊

[小呆之家]

Use StrToFloat to convert a string, 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.

自己仔细看看前面这段文字吧。呵~~，你就明白了。

The DecimalSeparator global variable or its TFormatSettings equivalent defines the character that is 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.

The first form of StrToFloat is not thread-safe, because it uses localization information contained in global variables. The second form of StrToFloat, which is thread-safe, refers to localization information contained in the FormatSettings parameter. Before calling the thread-safe form of StrToFloat, you must populate FormatSettings with localization information. To populate FormatSettings with a set of default locale values, call GetLocaleFormatSettings.

[zhitaoyang]

看楼主要保留几位小数了，例如2位的话，可以这样变下
i:= (int(4.849753E-01*100+0.5))/100;