请问这是什么fu值方式?

Question

tbDelete.Enabled:=(Astate=0) and 还有这句:(Copy(FAction,3,1)='0') ;   btnFilter.Enabled:=Astate=0;
  cmbCase.Enabled:=Astate=0;
  cmbProject.Enabled:=Astate=0;
  cmbSA.Enabled:=Astate=0;
  cmbPackage.Enabled:=Astate=0;  bbDone.Enabled:=AState<>0;
  bbCancel.Enabled:=AState<>0;如题,最好举个例子就太感激了.

Answer 1

意思如下
procedure TForm1.Button1Click(Sender: TObject);
var
  b : boolean;
begin
  b := True and False;      //b为  False
  showmessage(booltostr(b));
  b := True and True;       //b为  True
  showmessage(booltostr(b));
end;

Answer 2

cmbPackage.Enabled:=Astate=0; 翻译为if语句：if AState =0 then cmbPackage.Enabled:=true
else
  bbCancel.Enabled:=false;

Answer 3

tbDelete.Enabled  Astate=0 都是Bool型

Answer 4

=、<>、>、<、>=、<= 逻辑运算返回True或False
:= 赋值运算优先基本低于逻辑运算所以
btnFilter.Enabled:=Astate=0 
先运算Astate=0得到true或false然后赋给btnFilter.Enabled