WinAPI 字符及字符串函数(9): lstrcat - 合并字符串

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;

type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
p,p1,p2: PChar;
begin
p1 := 'Delphi';
p2 := '2009';

GetMem(p, 256);
p^ := #0;

lstrcat(p, p1);
lstrcat(p, ' ');
lstrcat(p, p2);

ShowMessage(p); {Delphi 2009}

FreeMem(p);
end;

procedure TForm1.Button2Click(Sender: TObject);
var
p1,p2: PChar;
buf: array[0..255] of Char;
begin
p1 := 'Delphi';
p2 := '2009';

FillChar(buf, Length(buf), #0);

lstrcat(buf, p1);
lstrcat(buf, ' ');
lstrcat(buf, p2);

ShowMessage(buf); {Delphi 2009}
end;

procedure TForm1.Button3Click(Sender: TObject);
var
p,p1,p2: PChar;
begin
p1 := 'Delphi';
p2 := '2009';
p := GetMemory(256);

lstrcpy(p, p1);

lstrcat(p, ' ');
lstrcat(p, p2);

ShowMessage(p); {Delphi 2009}

FreeMemory(p);
end;

var
buf: array[0..255] of Char;
procedure TForm1.Button4Click(Sender: TObject);
var
p1,p2: PChar;
begin
p1 := '万一的 ';
p2 := 'Delphi 博客';

lstrcat(buf, p1);
lstrcat(buf, p2);

ShowMessage(buf); {万一的 Delphi 博客}
end;

end.