关于类的入门例子(4): property

//类单元
unit Person;

interface

type
  TPerson = class(TObject)
  private
    FName: string;
    FAge: Integer;
  public
    procedure SetName(const strName: string);
    procedure SetAge(const intAge: Integer);
    property Name: string read FName write SetName;
    property Age: Integer read FAge write SetAge;
  end;

implementation

{ TPerson }

procedure TPerson.SetName(const strName: string);
begin
  FName := strName;
end;

procedure TPerson.SetAge(const intAge: Integer);
begin
  if intAge<0 then FAge := 0  else FAge := intAge;
end;

end.


//测试:
uses Person;

procedure TForm1.Button1Click(Sender: TObject);
var
  PersonOne: TPerson;
begin
  PersonOne := TPerson.Create;

  PersonOne.Name := '万一';
  PersonOne.Age := 100;

  ShowMessage('姓名:' + PersonOne.Name + '; 年龄:' +
    IntToStr(PersonOne.Age));  //姓名:万一; 年龄:100

  PersonOne.Free;
end;