C/C++多种办法获得文件大小[VC/C++编程]

C/C++多种办法获得文件大小

#include <iostream>
#include <io.h>
#include <sysstat.h>
#include <afx.h>
#define _AFXDLL
using namespace std;
void main()
{
// 此文件在工程翻开状况下为不可拜候
char* filepath = "..\test.ncb";
// 办法一
struct _stat info;
_stat(filepath, &info);
int size = info.st_size;
cout<<size<<endl;
// 办法二
FILE* file = fopen(filepath, "rb");
if (file)
{
int size = filelength(fileno(file));
cout<<size<<endl;
fclose(file);
}
// 办法三
CFile cfile;
if (cfile.Open(filepath, CFile::modeRead))
{
int size = cfile.GetLength();
cout<<size<<endl;
}
// 办法四
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);
}
}

也可以直接调用WinAPI函数GetFileSize嘛,

DWORD WINAPI GetFileSize（
__in HANDLE hFile,
__out LPDWORD lpFileSizeHigh
）;

支持Win2000及今后的系统