获取文件大小的方法(转)

#include <iostream>
#include <io.h>
#include <sys/stat.h>
#include <afx.h>
#define _AFXDLL
using   namespace  std;

void  main()
{
    // 此文件在工程打开状态下为不可访问
    char * filepath =  "..//test.ncb" ;

    // 方法一
    struct   _stat  info;
    _stat (filepath, &info);
    int  size = info.st_size;
    cout<<size<<endl;

    // 方法二
    FILE * file = fopen(filepath,  "rb" );
    if  (file)
    {
        int  size = filelength(fileno(file));
        cout<<size<<endl;
        fclose(file);
    }

    // 方法三
    CFile cfile;
    if  (cfile.Open(filepath, CFile::modeRead))
    {
        int  size = cfile.GetLength();
        cout<<size<<endl;
    }

    // 方法四
    HANDLE  handle = CreateFile(filepath, 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);
    }
}