C + + Get file size

First, Introduction

I want to implement a simple Web server, encountered a problem is to get the file size sent to the client, namely: Content-length parameter.

Second, the method

Method One:

LongGetfilelength (stringstrpath) {    LongLsize =0; Ifstream Fin (Strpath.c_str (), iOS::inch|ios::binary); Charszbuf[1024x768* +] ="";  while(Fin.read (Szbuf,1024x768* +-1) ) {lsize+=strlen (SZBUF); memset (Szbuf,0,1024x768* +);    } fin.close (); Lsize+=strlen (SZBUF); returnlsize;}

Method Two:

Long Getfilelength (string  strpath) {        ifstream fin (Strpath.c_str (), iOS::in | iOS:: binary);    FIN.SEEKG (0, ios_base::end);     = Fin.tellg ();     long lsize = static_cast<long>(POS);    Fin.close ();     return lsize;}

C + + Get file size