The code below shows the normal way to use the QCA::Random class.
Copyright (C) 2004, 2006 Brad Hards <[email protected]>
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// QtCrypto has the declarations for all of QCA
int main(int argc, char **argv)
// the Initializer object sets things up, and
// also does cleanup when it goes out of scope
QCoreApplication app(argc, argv);
qDebug() << "This example generates random numbers";
// This is the standard way to generate a random integer.
randInt = QCA::Random::randomInt();
qDebug() << "A random number: " << randInt;
// If you wanted a random character (octet), you could
// use something like:
unsigned char randChar;
randChar = QCA::Random::randomChar();
// It might not be printable, so this may not produce output
std::cout << "A random character: " << randChar << std::endl;
// If you need more random values, you may want to
// get an array, as shown below.
tenBytes = QCA::Random::randomArray(10);
// To make this viewable, we convert to hexadecimal.
std::cout << "A random 10 byte array (in hex): ";
std::cout << qPrintable(QCA::Hex().arrayToString(tenBytes)) << std::endl;
// Under some circumstances, you may want to create a
// Random object, rather than a static public member function.
// This isn't normally the easiest way, but it does work
randChar = myRandomObject.nextByte();
tenBytes = myRandomObject.nextBytes(10);