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procedure CHOBSB(A:MATRX2; N:integer; D:array of real;var B:array of real);
var
  I,J:integer; SUM:real;
begin
  For I:=1 To N do
  begin
  Sum:=B[I];
  For J:=1 To I - 1 do
  Sum:=Sum - A[I, J] * B[J];
  B[I]:=Sum;
  end;
  For I:=N DownTo 1 do
  begin
  If D[I] = 0 Then
  begin
  ShowMessage('Singular Matrix');
  Exit;
  end
  Else
  Sum:=B[I] / D[I];
  For J:=I + 1 To N do
  Sum:=Sum - A[J, I] * B[J];
  B[I]:=Sum;
  end;
end;


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===============================================================================
procedure CHOBSB(A:MATRX2; N:integer; D:array of real;var B:array of real);
var
I,J:integer; SUM:real;
begin
For I:=1 To N do
begin
Sum:=B[I];
For J:=1 To I - 1 do
Sum:=Sum - A[I, J] * B[J];
B[I]:=Sum;
end;
For I:=N DownTo 1 do
begin
If D[I] = 0 Then
begin


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procedure TForm1.Button2Click(Sender: TObject);
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