unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls; type TForm1 = class(TForm) Edit1: TEdit; Button1: TButton; Label1: TLabel; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form1: TForm1; implementation {$R *.dfm} procedure TForm1.Button1Click(Sender: TObject); var str1,word:string; i,j:integer; begin str1:='dsf4654f6<ds>ad<<<' ; word:=Edit1.Text; j:=pos(word,str1);//在字符串str1中查找"<" if j<>0 then //得到的j是字符串中出现的位置,是整型 showmessage('<'+'在第'+inttostr(j)+'个位置'); //第十个位置 end; end.
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执行时间: 0.043333053588867 seconds