相关疑难解决方法(0)

我正在使用Delphi XE2 Update 3.即使是最简单的浮点数(如3.7)也存在精度问题.鉴于此代码(32位控制台应用程序):

program Project1;

{$APPTYPE CONSOLE}
{$R *.res}

uses System.SysUtils;

var s: Single; d: Double; x: Extended;
begin
  Write('Size of Single  -----  ');  Writeln(SizeOf(Single));
  Write('Size of Double  -----  ');  Writeln(SizeOf(Double));
  Write('Size of Extended  ---  ');  Writeln(SizeOf(Extended));  Writeln;

  s := 3.7;  d := 3.7;  x := 3.7;

  Write('"s" is ');                  Writeln(s);
  Write('"d" is ');                  Writeln(d);
  Write('"x" is ');                  Writeln(x);                 Writeln;

  Writeln('Single Comparison');
  Write('"s > 3.7"  is  ');          Writeln(s > 3.7);
  Write('"s = 3.7"  is  ');          Writeln(s = …