C++计算文件大小

#include < iostream> 
#include < io.h> 
#include < sysstat.h> 
#include < afx.h> 
using namespace std;
void main()
{
CFile cfile;
CFileStatus rStatus;
CFile::GetStatus(_T("E:\Syslogd\Logs\SyslogCatchAll.txt"),rStatus);
ULONGLONG ulong = rStatus.m_size/1024;

printf("%d",ulong);

或者下面/////////////////////////

HANDLE handle = CreateFile("E:\Syslogd\Logs\SyslogCatchAll.txt", FILE_READ_EA, 
FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);  
if (handle != INVALID_HANDLE_VALUE)  
{  
int size = GetFileSize(handle, NULL);  
cout<<size<<endl;  
CloseHandle(handle);  
}

}