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74 lines
1.4 KiB
ObjectPascal
74 lines
1.4 KiB
ObjectPascal
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unit KR21Unit;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
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StdCtrls;
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type
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{ TKR21Frm }
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TKR21Frm = class(TForm)
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ResetBtn: TButton;
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CancelBtn: TButton;
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ComputeBtn: TButton;
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ReturnBtn: TButton;
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NoItemsEdit: TEdit;
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MeanEdit: TEdit;
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StdDevEdit: TEdit;
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RelEdit: TEdit;
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Label1: TLabel;
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Label2: TLabel;
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Label3: TLabel;
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Label4: TLabel;
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procedure ComputeBtnClick(Sender: TObject);
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procedure FormShow(Sender: TObject);
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procedure ResetBtnClick(Sender: TObject);
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private
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{ private declarations }
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public
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{ public declarations }
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end;
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var
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KR21Frm: TKR21Frm;
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implementation
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{ TKR21Frm }
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procedure TKR21Frm.ResetBtnClick(Sender: TObject);
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begin
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NoItemsEdit.Text := '';
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MeanEdit.Text := '';
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StdDevEdit.Text := '';
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RelEdit.Text := '';
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end;
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procedure TKR21Frm.FormShow(Sender: TObject);
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begin
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ResetBtnClick(self);
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end;
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procedure TKR21Frm.ComputeBtnClick(Sender: TObject);
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var
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items, mean, stddev, rel : double;
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begin
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items := StrToFloat(NoItemsEdit.Text);
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mean := StrToFloat(MeanEdit.Text);
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stddev := StrToFloat(StdDevEdit.Text);
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rel := (items / (items - 1.0)) * (1.0 - (mean * (items - mean))/
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(items * sqr(stddev)));
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RelEdit.Text := FloatToStr(rel);
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end;
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initialization
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{$I kr21unit.lrs}
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end.
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