void MainWindow::on_actionRandomGeneration_triggered()
{
on_actionClear_triggered();
isSelectMannually = false;
RandomPointsDialog * dialog = new RandomPointsDialog(this);
dialog->exec();
QTime t;
t.start();
std::random_device rd;
std::mt19937 gen;
gen.seed(rd());
for(int i = 0; i < dialog->getPointsNumber(); i++)
{
std::uniform_int_distribution<int> randx(1, this->width() / 2 - 2);
std::uniform_int_distribution<int> randy(100, this->height() - 2); // 100 in order to avoid paint on toolbar
points.append(QPoint(randx(gen), randy(gen)));
}
qDebug()<<"random time: "<<t.elapsed() / 1000.0;
update();
isRandomized = true;
}
int _tmain (int argc, LPTSTR argv [])
{
DWORD nRec, i;
FILE *fp;
DWORD iR;
FILETIME fileTime; /* Times to seed random #s. */
SYSTEMTIME sysTime;
TCHAR buffer [256];
if (argc < 3)
ReportError (_T("Uasge: randfile nrec file"), 1, FALSE);
nRec = _ttoi (argv [1]);
if (_tfopen_s (&fp, argv [2], _T("wb")) != 0)
ReportError (_T ("Failed opening output."), 2, TRUE);
GetSystemTime (&sysTime);
SystemTimeToFileTime (&sysTime, &fileTime);
srandx (fileTime.dwLowDateTime);
for (i = 0; i < nRec; i++)
{
iR = randx ();
/* 62 characters, CR, LF */
_stprintf_s (buffer, sizeof(buffer), _T("%08x. Record Number: %08d.abcdefghijklmnopqrstuvwxyz x"), iR, i);
buffer[62] = CR;
buffer[63] = LF;
// _fseeki64 (fp, ((__int64)64)*i, SEEK_SET); /* Assure that an extra null character is not inserted */ /* Not needed */
fwrite (buffer, 64, sizeof(TCHAR), fp); /* 64 characters, including CR, LF, but not EOL */
}
fclose (fp);
return 0;
}
