unit Unit3;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
Var
a,b,c,f:Integer;
begin
f:=0;
for a:=1 to 16 do
  begin
  for b:=1 to 25 do
      begin
      for c:=1 to 50 do
          if((3*a+2*b+c=50)and(a+b+c=30)) then
          begin
          Edit1.Text:=IntToStr(a);
          Edit2.Text:=IntToStr(b);
          Edit3.Text:=IntToStr(c);
          f:=1;
          break; // 找到一組答案時，跳出循環(huán)體
          end;
      end;
      if(f=1) then  break;
  end;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
Edit1.Text:='';
Edit2.Text:='';
Edit3.Text:='';
end;

end.