//系统类型
(*
TRect = packed record
case Integer of
0: (Left, Top, Right, Bottom: Longint);
1: (TopLeft, BottomRight: TPoint);
end;
*)
procedure TForm1.Button1Click(Sender: TObject);
begin
Button1.Left := ClientRect.TopLeft.X; //Button1.Left := ClientRect.Left;
end;//自定义类型
procedure TForm1.Button1Click(Sender: TObject);
type
TByteChar = record
case Boolean of
False: (rChar: Char);
True: (rByte: Byte);
end;
var
vByteChar: TByteChar;
begin
vByteChar.rByte := 97;
ShowMessage(vByteChar.rChar);
end;//把她理解成同一个空间保存两种类型
(*
TRect = packed record
case Integer of
0: (Left, Top, Right, Bottom: Longint);
1: (TopLeft, BottomRight: TPoint);
end;
*)
procedure TForm1.Button1Click(Sender: TObject);
begin
Button1.Left := ClientRect.TopLeft.X; //Button1.Left := ClientRect.Left;
end;//自定义类型
procedure TForm1.Button1Click(Sender: TObject);
type
TByteChar = record
case Boolean of
False: (rChar: Char);
True: (rByte: Byte);
end;
var
vByteChar: TByteChar;
begin
vByteChar.rByte := 97;
ShowMessage(vByteChar.rChar);
end;//把她理解成同一个空间保存两种类型
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