C、C++获取文件大小（占用字节数）

static fpos_t GetFileLen(IN FILE *fp)
{
	fpos_t pos = -1;

	if( fseek(fp,0,SEEK_END) ||
		fgetpos(fp,&pos) ||
		fseek(fp,0,SEEK_SET) )
	{

	}

	return pos;
}