在C++ BUILDER中使用STL::string的问题

#include <vcl.h>

#include <string>

#pragma hdrstop



#include "Unit1.h"

//---------------------------------------------------------------------------

#pragma package(smart_init)

#pragma resource "*.dfm"

TForm1 *Form1;

//---------------------------------------------------------------------------

__fastcall TForm1::TForm1(TComponent* Owner)

	: TForm(Owner)

{

	bool m_stop;

	std::string f;

	//string f;

	f.append(0,2);

	f[0]=1;

	f[1]=3;

	//f="cd";



	//char f[2]={1,3};

	//char f=2;



	//string s;

	std::string s;

	s.append(0,5);

	s[0]=1;

	s[1]=2;

	s[2]=1;

	s[3]=3;

	s[4]=1;

	//s="abcde";



	unsigned int pp=0;

	pp=s.find(f);







	m_stop=false;

}