C/C++多种步骤获取文件大小

原文：http://www.cnblogs.com/cxun/archive/2009/02/24/1397153.html

#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);
    }
}