C++取得ファイルサイズ方式(MFC,linux,C++,C)

#include < iostream> 
#include < io.h> 
#include < sys\stat.h> 
#include < afx.h> 
#define _AFXDLL  
using namespace std;
void main()
{
	//                   
	char* filepath = "..\\test.ncb";
	// C++           
	struct stat info;
	stat(filepath, &info);
	int size = info.st_size;
	cout < < size < < endl;
	// C++           
	FILE* file = fopen(filepath, "rb");
	if (file)
	{
		int size = filelength(fileno(file));
		cout < < size < < endl;
		fclose(file);
	}
	// C++           
	CFile cfile;
	if (cfile.Open(filepath, CFile::modeRead))
	{
		int size = cfile.GetLength();
		cout < < size < < endl;
	}
	// C++           
	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);
	}
}