Generating random-value integers in Qt

Article Metadata

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Tested with

Devices(s): Nokia 5800 XpressMusic

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Compatibility

Platform(s): S60 3rd Edition, FP1, FP2
S60 5th Edition

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Article

Keywords: qrand

Created: tepaa (08 Apr 2009)

Last edited: hamishwillee (11 Oct 2012)

Overview

This code snippet shows how to generate a random integer in Qt.

Preconditions

• Install Qt SDK

Source

#include <QGlobal.h>
#include <QTime>
 
int QMyClass::randInt(int low, int high)
    {
    // Random number between low and high
    return qrand() % ((high + 1) - low) + low;
    }

// Create seed for the random
// That is needed only once on application startup
QTime time = QTime::currentTime();
qsrand((uint)time.msec());
 
// Get random value between 0-100
int randomValue = randInt(0,100);

Postconditions

A random number is given.