Решение системы линейных уравнений методом Гаусса и Жордана-Гаусса
14.11.2014, 23:41. Показов 3280. Ответов 3
Помогите пожалуйста начала работать сначала работать с методом Гаусса, но в Unit2 Delphi ругается на type arys=array[1..maxr] of real;
не могу понять что не так...
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| unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, Menus, XPMan, StdCtrls, Grids;
type
TForm1 = class(TForm)
MainMenu1: TMainMenu;
N1: TMenuItem;
New1: TMenuItem;
Save1: TMenuItem;
Exit1: TMenuItem;
XPManifest1: TXPManifest;
SaveDialog1: TSaveDialog;
Matrix: TStringGrid;
Coef: TStringGrid;
Gaus: TStringGrid;
JGaus: TStringGrid;
Button1: TButton;
Button2: TButton;
procedure Exit1Click(Sender: TObject);
procedure New1Click(Sender: TObject);
procedure Save1Click(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
s:integer;
implementation
uses Unit2;
{$R *.dfm}
procedure TForm1.Exit1Click(Sender: TObject);
begin
close;
end;
procedure TForm1.New1Click(Sender: TObject);
var i,dl:integer;
prover:string;
begin
form1.Enabled:=false;
repeat
prover:=inputbox('Ââåäèòåðàçìåðñèñòåìû','Çíà÷åíèåìåæäó 2 è 20','2');
dl:=length(prover);
if dl=0 then showmessage('Ââåäèòåðàçìåðñèñòåìû') else
begin
if (dl=1) and (prover<'9') and (prover>'0') then s:=trunc(strtofloat(prover))
else
begin
for i:=1 to dl do
begin
if prover[i]>'9' then
begin
showmessage('Ââåäèòå÷èñëî');
break;
end
else if i=dl then s:=trunc(strtofloat(inputbox('Ââåäèòåðàçìåðñèñòåìû','Çíà÷åíèåìåæäó 2 è 20','2')));
end;
end;
end;
until (s>=2) and (s<=maxr);
form1.Enabled:=true;
matrix.RowCount:=s+1;
matrix.ColCount:=s+1;
gauss.colCount:=s+1;
coef.rowCount:=s+1;
jgauss.colCount:=s+1;
coef.Cells[1,0]:='B';
gauss.Cells[0,1]:='Gauss';
jgauss.Cells[0,1]:='J-Gauss';
for i:=1 to s do
begin
matrix.Cells[0,i]:=floattostr(i);
matrix.Cells[i,0]:='A'+floattostr(i);
coef.Cells[0,i]:=floattostr(i);
gauss.Cells[i,0]:='X'+floattostr(i);
jgauss.Cells[i,0]:='X'+floattostr(i);
end;
end;
procedure TForm1.Save1Click(Sender: TObject);
begin
var f:textfile;
i,j:integer;
begin
savedialog1.Filter:='Text files (*.txt)|*.txt|';
if savedialog1.Execute then
begin
assignfile(f,savedialog1.filename+'.txt');
rewrite(f);
for i:=1 to s do
begin
writeln(f);
for j:=1 to s do
write(f,matrix.cells[i,j]:4,' ');
write(f,'|',coef.cells[1,i]);
end;
writeln(f);
writeln(f);
writeln(f,'Gauss');
for i:=1 to s do
writeln(f,'X'+floattostr(i)+'='+gauss.cells[i,1],' ');
writeln(f);
writeln(f,'J-Gauss');
for i:=1 to s do
writeln(f,'X'+floattostr(i)+'='+jgauss.cells[i,1],' ');
closefile(f);
end;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
var a:ary2s;
x,y:arys;
error:boolean;
i,j,l,K:integer;
prover:string;
begin
{Ñ÷èòûâàíèå ìàññèâîâ ñ èñõîäíûìè äàííûìè è ïðîâåðêà '.' èëè ','}
{***********************************************}
for i:=1 to s do
for j:=1 to s do
begin
prover:=matrix.Cells[j,i];
k:=length(prover);
if k=0 then
begin
showmessage('Âû íå ââåëè îäèí èëè íåñêîëüêî ýëåìåíòîâ ñèñòåìû.');
exit;
end;
for l:=1 to length(prover) do
if prover[l]='.' then prover[l]:=','
else if prover[l]>'9' then
begin
showmessage(' êà÷åñòâå îäíîãî èëè íåñêîëüêèõ ýëåìåíòîâ ñèñòåìû ââåäåíà áóêâà. Çàìåíèòåèõíà÷èñëà!');
exit;
end;
matrix.Cells[j,i]:=prover;
a[i,j]:=strtofloat(matrix.cells[j,i]);
end;
for i:=1 to s do
begin
prover:=coef.cells[1,i];
for l:=1 to length(prover) do
if prover[l]='.' then prover[l]:=','
else if prover[l]>'9' then
begin
showmessage(' êà÷åñòâå îäíîãî èëè íåñêîëüêèõ ýëåìåíòîâ ñèñòåìû ââåäåíà áóêâà. Çàìåíèòåèõíà÷èñëà!');
exit;
end;
coef.cells[1,i]:=prover;
y[i]:=strtofloat(coef.cells[1,i]);
end;
{***********************************************}
{Ðåøåíèå è âûâîä ðåçóëüòàòîâ}
{***********************************************}
gauss1(a,y,x,s,error);
if not error then
for i:=1 to s do
gauss.cells[i,1]:=floattostr(x[i])
else
begin
showmessage('Ñèñòåìà ðåøåíèÿ íå èìååò');
new1.Click;
end;
{***********************************************}
end;
end. |
|
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| unit Unit2;
interface
const maxr=20
type arys=array[1..maxr] of real;- проблемы начались здесь
ary2s=array[1..maxr,1..maxr] of real;
procedure gauss1(a:ary2s; y:arys; var coef:arys; ncol:integer; var error:boolean);
procedure gaussj(var b:ary2s; y: arys; var coef:arys; ncol:integer; var error: boolean);
implementation
{Ðåøåíèå ñèñòåìû ëèíåéíûõ óðàâíåíèé ìåòîäîì Ãàóññà}
{**********************************************************}
procedure gauss1(a:ary2s; y:arys; var coef:arys; ncol:integer; var error:boolean);
var b:ary2s;
w:arys;
i,j,i1,k,l,n:integer;
hold,sum,t,ab,big: real;
begin
error:=false;
n:=ncol;
for i:=1 to n do
begin
for j:=1 to n do
b[i,j]:=a[i,j];
w[i]:=y[i]
end;
for i:=1 to n-1 do
begin
big:=abs(b[i,i]);
l:=i;
i1:=i+1;
for j:=i1 to n do
begin
ab:=abs(b[j,i]);
if ab>big then
begin
big:=ab;
l:=j
end
end;
if big=0.0 then error:= true
else
begin
if l<>i then
begin
for j:=1 to n do
begin
hold:=b[l,j];
b[l,j]:=b[i,j];
b[i,j]:=hold
end;
hold:=w[l];
w[l]:=w[i];
w[i]:=hold
end;
for j:=i1 to n do
begin
t:=b[j,i]/b[i,i];
for k:=i1 to n do
b[j,k]:=b[j,k]-t*b[i,k];
w[j]:=w[j]-t*w[i]
end
end
end;
if b[n,n]=0.0 then error:=true
else
begin
coef[n]:=w[n]/b[n,n];
i:=n-1;
repeat
sum:=0.0;
for j:=i+1 to n do
sum:=sum+b[i,j]*coef[j];
coef[i]:=(w[i]-sum)/b[i,i];
i:=i-1
until i=0
end
end;
{**********************************************************}
{Ðåøåíèå ñèñòåìû ëèíåéíûõ óðàâíåíèé ìåòîäîì Æîðäàíà-Ãàóññà}
{**********************************************************}
procedure gaussj(var b:ary2s; y: arys; var coef:arys; ncol:integer; var error: boolean);
var w:array[1..maxr,1..maxr] of real;
index:array[1..maxr,1..3] of integer;
i,j,k,l,nv,irow,icol,n,l1:integer;
determ,pivot,hold,sum,t,ab,big:real;
{++++++++++++++++++++++++++++++++++++++++++++}
procedure swap(var a,b: real);
var hold:real;
begin
hold:=a;
a:=b;
b:=hold
end;
{++++++++++++++++++++++++++++++++++++++++++++}
{@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@}
procedure gausj2;
var i,j,k,l,l1:integer;
{===============================================}
procedure gausj3;
var l:integer;
begin
if irow<>icol then
begin
determ:=-determ;
for l:=1 to n do
swap(b[irow,l],b[icol,l]);
if nv>0 then
for l:=1 to nv do
swap(w[irow,l],w[icol,l])
end
end;
{===============================================}
begin
error:=false;
nv:=1;
n:=ncol;
for i:=1 to n do
begin
w[i,1]:=y[i];
index[i,3]:=0
end;
determ:=1.0;
for i:=1 to n do
begin
big:=0.0;
for j:=1 to n do
begin
if index[j,3]<>1 then
begin
for k:=1 to n do
begin
if index[k,3]>1 then
begin
error:=true;
exit;
end;
if index[k,3]<1 then
if abs(b[j,k])>big then
begin
irow:=j;
icol:=k;
big:=abs(b[j,k])
end
end
end
end;
index[icol,3]:=index[icol,3]+1;
index[i,1]:=irow;
index[i,2]:=icol;
gausj3;
pivot:=b[icol,icol];
determ:=determ*pivot;
b[icol,icol]:=1.0;
for l:=1 to n do
b[icol,l]:=b[icol,l]/pivot;
if nv>0 then
for l:=1 to nv do
w[icol,l]:=w[icol,l]/pivot;
for l1:=1 to n do
begin
if l1<>icol then
begin
t:=b[l1,icol];
b[l1,icol]:=0.0;
for l:=1 to n do
b[l1,l]:=b[l1,l]-b[icol,l]*t;
if nv>0 then
for l:=1 to nv do
w[l1,l]:=w[l1,l]-w[icol,l]*t;
end
end
end;
end;
{@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@}
begin
gausj2;
if error then exit;
for i:=1 to n do
begin
l:=n-i+1;
if index[l,1]<>index[l,2] then
begin
irow:=index[l,1];
icol:=index[l,2];
for k:=1 to n do
swap(b[k,irow],b[k,icol])
end
end;
for k:=1 to n do
if index[k,3]<>1 then
begin
error:=true;
exit;
end;
for i:=1 to n do
coef[i]:=w[i,1];
end;
{**********************************************************}
end. |
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