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|
program Project1;
{$mode objfpc}{$H+}
{$codepage utf8}
uses
{$IFDEF UNIX}
cthreads,
{$ENDIF}
Classes, SysUtils, CustApp
{ you can add units after this };
type StateType = (pay, coffee, cup, back);
type CommandType = (
pay5, pay10, pay20, pay50, pay100, pay200,
chooseblack, choosesugar, coosecappu, choosecacao,
choosecup, choosenocup, payback
);
type
{ TStateMachine }
TStateMachine = class(TCustomApplication)
protected
procedure DoRun; override;
public
constructor Create(TheOwner: TComponent); override;
destructor Destroy; override;
function GetNextCommand: CommandType;
end;
{ TStateMachine }
procedure TStateMachine.DoRun;
var
ErrorMsg: String;
State: StateType = pay;
Command: CommandType;
moneyPayed: Integer = 0;
begin
// quick check parameters
ErrorMsg := CheckOptions('h', 'help');
if ErrorMsg <> '' then begin
ShowException(Exception.Create(ErrorMsg));
Terminate;
Exit;
end;
while true do
begin
Command := GetNextCommand;
case State of
pay:
begin
case Command of
pay5:
begin
moneyPayed := moneyPayed + 5;
end;
pay10:
begin
moneyPayed := moneyPayed + 10;
end;
pay20:
begin
moneyPayed := moneyPayed + 20;
end;
pay50:
begin
moneyPayed := moneyPayed + 50;
end;
pay100:
begin
moneyPayed := moneyPayed + 100;
end;
pay200:
begin
moneyPayed := moneyPayed + 200;
end;
chooseblack, choosesugar, coosecappu, choosecacao:
begin
if moneyPayed >= 70 then
begin
State := coffee;
end
else
begin
WriteLn('Вы бросили недостаточно денег.');
end;
end
else
WriteLn('Неверная команда!');
end;
end;
coffee:
begin
case Command of
choosecup, choosenocup:
begin
State := cup;
end;
else
WriteLn('Неверная команда!');
end;
end;
cup:
begin
case Command of
payback:
begin
State := back;
WriteLn('Ваша сдача: ' + IntToStr(moneyPayed - 70));
Break;
end;
else
WriteLn('Неверная команда!');
end;
end;
back:
begin
end;
end;
end;
// stop program loop
Terminate;
end;
constructor TStateMachine.Create(TheOwner: TComponent);
begin
inherited Create(TheOwner);
StopOnException:=True;
end;
destructor TStateMachine.Destroy;
begin
inherited Destroy;
end;
function TStateMachine.GetNextCommand: CommandType;
var
Input: String;
begin
Writeln('Введите команду:');
while true do
begin
Readln(Input);
case Input of
'pay5':
begin
Result := pay5;
Exit;
end;
'pay10':
begin
Result := pay10;
Exit;
end;
'pay20':
begin
Result := pay20;
Exit;
end;
'pay50':
begin
Result := pay50;
Exit;
end;
'pay100':
begin
Result := pay100;
Exit;
end;
'pay200':
begin
Result := pay200;
Exit;
end;
'chooseblack':
begin
Result := chooseblack;
Exit;
end;
'choosesugar':
begin
Result := choosesugar;
Exit;
end;
'choosecappu':
begin
Result := coosecappu;
Exit;
end;
'choosecacao':
begin
Result := choosecacao;
Exit;
end;
'choosecup':
begin
Result := choosecup;
Exit;
end;
'choosenocup':
begin
Result := choosenocup;
Exit;
end;
'payback':
begin
Result := payback;
Exit;
end
else Writeln('Команда не существует. Попробуйте еще раз:');
end;
end;
end;
var
Application: TStateMachine;
begin
Application:=TStateMachine.Create(nil);
Application.Title:='State automat';
Application.Run;
Application.Free;
end.
|
