C++獲取文件大小常用技巧

#include <iostream>
#include <io.h>
#include <sys\stat.h>
#include <afx.h>
#define _AFXDLL
using namespace std;
void main()
{
	// 此文件在工程打開狀態下爲不可訪問
	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);
	}
}