Почему то не высчитывает производную, первую и вторую. Помогите пожалуйста!
Добавлено через 2 минуты и 14 секунд
| Код |
unit Unit9;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
PTElement=^TElement;
PPlus=^Plus;
PMinus=^Minus;
PMult=^Mult;
PDivide=^Divide;
PReal=^Real;
PVariable=^Variable;
TElement=object
protected
left,right:PTElement;
constructor Create(l,r:PTElement);
public
destructor Erase;
function rezult:double; virtual;
function copy:PTElement; virtual;
function differ:PTElement; virtuaL;
procedure set_var(float:double); virtual;
end;
Real=object(TElement)
private
f:double;
public
constructor Create(float:double);
function rezult:double; virtual;
function copy:PTElement; virtual;
function differ:PTElement; virtual;
end;
Variable=object(TElement)
private
f:double;
public
constructor Create(float:double);
function rezult:double; virtual;
function copy:PTElement; virtual;
function differ:PTElement; virtual;
procedure set_var(float:double); virtual;
end;
Plus=object(TElement)
public
constructor Create(l,r:PTElement);
function rezult:double; virtual;
function copy:PTElement; virtual;
function differ:PTElement; virtual;
end;
Minus=object(TElement)
public
constructor Create(l,r:PTElement);
function rezult:double; virtual;
function copy:PTElement; virtual;
function differ:PTElement; virtual;
end;
Mult=object(TElement)
public
constructor Create(l,r:PTElement);
function rezult:double; virtual;
function copy:PTElement; virtual;
function differ:PTElement; virtual;
end;
Divide=object(TElement)
public
constructor Create(l,r:PTElement);
function rezult:double; virtual;
function copy:PTElement; virtual;
function differ:PTElement; virtual;
end;
TForm1 = class(TForm)
GroupBox1: TGroupBox;
GroupBox2: TGroupBox;
GroupBox3: TGroupBox;
Button1: TButton;
Button2: TButton;
ComboBox1: TComboBox;
Label1: TLabel;
Edit1: TEdit;
Edit2: TEdit;
Label2: TLabel;
Label3: TLabel;
Edit3: TEdit;
Edit4: TEdit;
Edit5: TEdit;
Edit6: TEdit;
Label4: TLabel;
Label5: TLabel;
Label6: TLabel;
Label7: TLabel;
procedure Button1Click(Sender: TObject);
procedure ComboBox1Change(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
constructor TElement.Create(l,r:PTElement);
begin
left:=l;
right:=r;
end;
destructor TElement.Erase;
begin
Dispose(left);
Dispose(right);
end;
function Telement.rezult:double;
begin
end;
function TElement.copy:PTElement;
begin
copy:=nil;
end;
function TElement.differ:PTElement;
begin
differ:=nil;
end;
procedure TElement.set_var(float:double);
begin
if left<>nil then left^.set_var(float);
if right<>nil then right^.set_var(float);
end;
constructor Real.Create(float:double);
begin
inherited Create(nil,nil);
f:=float;
end;
function Real.rezult:double;
begin
rezult:=f;
end;
function Real.copy:PTElement;
var PtrReal:PReal;
begin
New(PtrReal,Create(f));
copy:=PtrReal;
end;
function Real.differ:PTElement;
var PtrReal:PReal;
begin
New(PtrReal,Create(0));
differ:=PtrReal;
end;
constructor Variable.Create(float:double);
begin
inherited Create(nil,nil);
f:=float;
end;
function Variable.rezult:double;
begin
rezult:=f;
end;
function Variable.copy:PTElement;
var PtrVariable:PVariable;
begin
New(PtrVariable,Create(f));
copy:=PtrVariable;
end;
function Variable.differ:PTElement;
var PtrVariable:PReal;
begin
New(PtrVariable,Create(1.0));
differ:=PtrVariable;
end;
procedure Variable.set_var(float:double);
begin
f:=float;
end;
constructor Plus.Create(l,r:PTElement);
begin
inherited Create(l,r);
end;
function Plus.rezult:double;
begin
rezult:=left^.rezult+right^.rezult;
end;
function Plus.copy:PTElement;
var PtrPlus:PPlus;
begin
New(PtrPlus,Create(left^.copy,right^.copy));
copy:=PtrPlus;
end;
function Plus.differ:PTElement;
var PtrPlus:PPlus;
begin
New(PtrPlus,Create(left^.differ,right^.differ));
differ:=PtrPlus;
end;
constructor Minus.Create(l,r:PTElement);
begin
inherited Create(l,r);
end;
function Minus.rezult:double;
begin
rezult:=left^.rezult-right^.rezult;
end;
function Minus.copy:PTElement;
var PtrMinus:PMinus;
begin
New(PtrMinus,Create(left^.copy,right^.copy));
copy:=PtrMinus;
end;
function Minus.differ:PTElement;
var PtrMinus:PMinus;
begin
New(PtrMinus,Create(left^.differ,right^.differ));
differ:=PtrMinus;
end;
constructor Mult.Create(l,r:PTElement);
begin
inherited Create(l,r);
end;
function Mult.rezult:double;
begin
rezult:=left^.rezult*right^.rezult;
end;
function Mult.copy:PTElement;
var PtrMult:PMult;
begin
New(PtrMult,Create(left^.copy,right^.copy));
copy:=PtrMult;
end;
function Mult.differ:PTElement;
var PtrMult1,PtrMult2:PMult;
PtrPlus:PPlus;
begin
New(PtrMult1,Create(left^.differ,right^.differ));
New(PtrMult2,Create(left^.copy,right^.copy));
New(PtrPlus,Create(PtrMult1,PtrMult2));
differ:=PtrPlus;
end;
constructor Divide.Create(l,r:PTElement);
begin
inherited Create(l,r);
end;
function Divide.rezult:double;
begin
rezult:=left^.rezult/right^.rezult;
end;
function Divide.copy:PTElement;
var PtrDivide:PDivide;
begin
New(PtrDivide,Create(left^.copy,right^.copy));
copy:=PtrDivide;
end;
function Divide.differ:PTElement;
var PtrMult1,PtrMult2,PtrMult3:PMult;
PtrMinus:PMinus;
PtrDivide:PDivide;
begin
New(PtrMult1,Create(left^.differ,right^.differ));
New(PtrMult2,Create(left^.copy,right^.copy));
New(PtrMult3,Create(left^.copy,right^.copy));
New(PtrMinus,Create(PtrMult1,PtrMult2));
New(PtrDivide,Create(PtrMinus,PtrMult3));
differ:=PtrDivide;
end;
function PosFromEnd(sub,s:string):integer;
var i,l:integer;
p:string;
begin
l:=Length(s);
SetLength(p,l);
for i:=1 to l do p[l-i+1]:=s[i];
if Pos(sub,p)>0 then PosFromEnd:=l-Pos(sub,p)+1
else PosFromEnd:=0;
end;
function form(s:string):PTElement;
var PtrPlus:PPlus;
PtrMinus:PMinus;
PtrMult:PMult;
PtrDivide:PDivide;
PtrReal:PReal;
PtrVariable:PVariable;
p,l:integer;
s1,s2:string;
begin
l:=Length(s);
if PosFromEnd('+',s)>1 then
begin
p:=PosFromEnd('+',s);
s1:=Copy(s,1,p-1);
s2:=Copy(s,p+1,l-p);
New(PtrPlus,Create(form(s1),form(s2)));
form:=PtrPlus;
end
else if PosFromEnd('-',s)>1 then
begin
p:=PosFromEnd('-',s);
s1:=Copy(s,1,p-1);
s2:=Copy(s,p+1,l-p);
New(PtrMinus,Create(form(s1),form(s2)));
form:=PtrMinus;
end
else if PosFromEnd('*',s)>1 then
begin
p:=PosFromEnd('*',s);
s1:=Copy(s,1,p-1);
s2:=Copy(s,p+1,l-p);
New(PtrMult,Create(form(s1),form(s2)));
form:=PtrMult;
end
else if PosFromEnd('/',s)>1 then
begin
p:=PosFromEnd('/',s);
s1:=Copy(s,1,p-1);
s2:=Copy(s,p+1,l-p);
New(PtrDivide,Create(form(s1),form(s2)));
form:=PtrDivide;
end
else if s='x' then
begin
New(PtrVariable,Create(0));
form:=PtrVariable;
end
else
begin
New(PtrReal,Create(StrToFloat(s)));
form:=PtrReal;
end;
end;
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
var dec:integer;
x,f,f1,f2,f3:PTElement;
float:double;
begin
dec:=StrToInt(ComboBox1.Text);
x:=form(Edit1.Text);
f:=form(Edit2.Text);
f1:=f^.differ;
f2:=f1^.differ;
float:=x^.rezult;
f^.set_var(float);
f1^.set_var(float);
f2^.set_var(float);
Edit3.Text:=FloatToStrF(x^.rezult,ffFixed,25,dec);
Edit4.Text:=FloatToStrF(f^.rezult,ffFixed,25,dec);
Edit5.Text:=FloatToStrF(f1^.rezult,ffFixed,25,dec);
Edit6.Text:=FloatToStrF(f2^.rezult,ffFixed,25,dec);
end;
procedure TForm1.ComboBox1Change(Sender: TObject);
begin
if ComboBox1.Text<>'' then
Button1Click(Button1);
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
Close();
end;
end.
|
|