計算機除了加法都怪怪的ㄟ 真不知哪裡錯了 |
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尚未結案
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kay617
一般會員   發表：5 回覆：4 積分：1 註冊：2004-06-10 發送簡訊給我 |
unit Unit1; interface uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls; type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
Button5: TButton;
Button6: TButton;
Button7: TButton;
Button8: TButton;
Button9: TButton;
Button11: TButton;
Button12: TButton;
Button13: TButton;
Button14: TButton;
Button15: TButton;
Button10: TButton;
Edit1: TEdit;
procedure Button1Click(Sender: TObject);
procedure Button11Click(Sender: TObject);
procedure Button12Click(Sender: TObject);
procedure Button13Click(Sender: TObject);
procedure Button14Click(Sender: TObject);
procedure Button15Click(Sender: TObject); private
{ Private declarations }
public
{ Public declarations }
end; var
Form1: TForm1;
start:boolean;
num1,num2,result:extended;
implementation {$R *.dfm} procedure TForm1.Button1Click(Sender: TObject);
var s:string; begin if not edit1.Enabled then
begin
edit1.Clear;
edit1.Enabled:=true;
end;
edit1.SetFocus;
s:=tbutton(sender).Caption ;
case strtoint(s) of
0..9 :begin
if edit1.Text='0' then edit1.Text:='' ;
edit1.Text:=edit1.Text s ;
end;
end;
end;
procedure TForm1.Button11Click(Sender: TObject);
begin edit1.Enabled:=false;
end; procedure TForm1.Button12Click(Sender: TObject); begin if edit1.Text='0' then
begin
edit1.Text:='';
num1:=StrToFloat(edit1.Text);
end else
begin
num2:=StrToFloat(edit1.Text);
result:=(num1 num2);
num1:=result;
edit1.text:=FloatToStr(result);
end;
edit1.Enabled:=false; end; procedure TForm1.Button13Click(Sender: TObject);
begin
if edit1.Text='0' then
begin
edit1.Text:='';
num1:=StrToFloat(edit1.Text);
end else
begin
num2:=StrToFloat(edit1.Text);
Result:=(num2-num1);
num1:=result;
edit1.text:=FloatToStr(result);
end; edit1.Enabled:=false;
end; procedure TForm1.Button14Click(Sender: TObject);
begin if edit1.Text = ''then
begin
num1:=StrToFloat(edit1.Text);
end else
begin
num2:=StrToFloat(edit1.Text);
Result:=(num1*num2);
num1:=result;
edit1.text:=FloatToStr(result); end;
edit1.Enabled:=false;
end;
procedure TForm1.Button15Click(Sender: TObject);
begin
if start then
begin
start:=true;
num1:=StrToFloat(edit1.Text);
end
else begin
num2:=StrToFloat(edit1.Text);
Result:=(num1/num2);
num1:=result;
edit1.text:=FloatToStr(result); end;
edit1.Enabled:=false;
end; end.
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william
版主   發表：66 回覆：2535 積分：3048 註冊：2002-07-11 發送簡訊給我 |
Perhaps you should upload the whole project or post you .dfm file here for other to view.... Anyway there is at least some BUGs in your code...
if edit1.Text='0' then
begin
edit1.Text:='';
num1:=StrToFloat(edit1.Text);
end else
StrToFloat of an empty string?! It should raise exception.
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發表時間：2004-06-16 10:05:51
IP:211.72.xxx.xxx 未訂閱
系統時間：2024-05-15 19:14:50
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