C ++, TCHAR how to convert to std :: string type?

Look at this URL resolved: https: //blog.csdn.net/weixin_34023982/article/details/87380020

W2A function can be used to convert _TCHAR * char *, for example:

#include "the stdafx.h"
#include <stdlib.h>
#include <atlconv.h> // need to be added. 1

int the _tmain (int argc, _TCHAR * the argv [])
{
_TCHAR L * tchBuffer = "12345";

USES_CONVERSION ; // this should be added to two 2
char * szBuffer = W2A (tchBuffer); // should be added to these two. 3

int nNumber = atoi (szBuffer);

the printf ( "nNumber:% D", nNumber);

return 0 ;
}

Find a place of their own program error, can be added to the above three runs