| Description |
The PChar type is a pointer to an Char value.
It can also be used to point to characters within a string, as in the example code.
As with other pointers, integer arithmetic, such as Inc and Dec can be performed on a PChar variable, also shown in the example.
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| Notes |
PChar is principally used when processing null-terminated (C-like) strings.
At the current time, Char variables are identical to AnsiChar variables, being 8 bits in size.
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| Related commands |
| $ExtendedSyntax |
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Controls some Pascal extension handling |
| Char |
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Variable type holding a single character |
| Dec |
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Decrement an ordinal variable |
| Inc |
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Increment an ordinal variable |
| PAnsiChar |
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A pointer to an AnsiChar value |
| PString |
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Pointer to a String value |
| PWideChar |
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Pointer to a WideChar |
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| Example code : Display all characters in a string |
// Full Unit code.
// -----------------------------------------------------------
// You must store this code in a unit called Unit1 with a form
// called Form1 that has an OnCreate event called FormCreate.
unit Unit1;
interface
uses
// The System unit does not need to be defined
Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm} // Include form definitions
procedure TForm1.FormCreate(Sender: TObject);
var
myString : string;
myCharPtr : PChar;
i : Integer;
begin
// Create a string of Char's
myString := 'Hello World';
// Point to the first character in the string
i := 1;
myCharPtr := Addr(myString[i]);
// Display all characters in the string
while i <= Length(myString) do
begin
ShowMessage(myCharPtr^);
Inc(i);
Inc(myCharPtr);
end;
end;
end.
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| Hide full unit code |
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