| Description |
The PInt64 type is a pointer to an Int64 value.
Pointer arithmetic, such as Inc, Dec can be used on it, for example to navigate a block of Int64 values, as in the example.
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| Related commands |
| Dec |
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Decrement an ordinal variable |
| Inc |
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Increment an ordinal variable |
| Int64 |
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A 64 bit sized integer - the largest in Delphi |
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| Example code : Store 3 Int64 values in memory and navigate through them |
// Full Unit code.
// -----------------------------------------------------------
// You must store this code in a unit called Unit1 with a form
// called Form1 that has an OnCreate event called FormCreate.
unit Unit1;
interface
uses
// The System unit does not need to be defined
Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm} // Include form definitions
procedure TForm1.FormCreate(Sender: TObject);
var
int64Ptr : PInt64;
a : TDateTime;
begin
// Allocate storage for three Int64 variables
GetMem(int64Ptr, 3 * SizeOf(Int64));
// Fill out these Int64 variables
int64Ptr^ := 1;
Inc(int64Ptr);
int64Ptr^ := 22;
Inc(int64Ptr);
int64Ptr^ := 333;
// Now display these values
Dec(int64Ptr, 2);
ShowMessageFmt('Value 1 = %d',[int64Ptr^]);
Inc(int64Ptr);
ShowMessageFmt('Value 2 = %d',[int64Ptr^]);
Inc(int64Ptr);
ShowMessageFmt('Value 3 = %d',[int64Ptr^]);
end;
end.
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| Hide full unit code |
Value 1 = 1
Value 2 = 22
Value 3 = 333
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