如何在Delphi 7中使用AnsiReverseString反轉字符串

Question

我想在Borland Delphi 7中反轉字符串。如何使用AnsiReverseString函數反轉字符串？

Delphi 7是否支持這個功能？

Answer 1

像大家在評論中所說的那樣，將StrUtils單元添加到uses子句中。

unit Unit1; 

interface 

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

type 
    TForm1 = class(TForm) 
    Button1: TButton; 
    procedure Button1Click(Sender: TObject); 
    private 
    { Private declarations } 
    public 
    { Public declarations } 
    end; 

var 
    Form1: TForm1; 

implementation 

{$R *.dfm} 

procedure TForm1.Button1Click(Sender: TObject); 
var 
    source, target : AnsiString; 
begin 
    source := '123456789'; 
    target := AnsiReverseString(source); 

    ShowMessage('Source = '+source); 
    ShowMessage('Target = '+target); 
end; 

end.