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Generating random-value integers in Qt

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m (Protected "Random value in Qt" [edit=sysop:move=sysop])
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m (Text replace - "<code cpp>" to "<code cpp-qt>")
 
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{{CodeSnippet
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[[Category:Qt]][[Category:UI]]
|id=  
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{{ArticleMetaData <!-- v1.2 -->
|platform=Qt
+
|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
|devices=5800 XpressMusic
+
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
|category=Qt for S60
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|devices= Nokia 5800 XpressMusic
|subcategory=UI
+
|sdk= <!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
|creationdate=April 8, 2009
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|platform= S60 3rd Edition, FP1, FP2<br>S60 5th Edition
|keywords=qrand
+
|devicecompatability= <!-- Compatible devices (e.g.: All* (must have GPS) ) -->
 +
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 +
|signing= <!-- Empty or one of Self-Signed, DevCert, Manufacturer -->
 +
|capabilities= <!-- Capabilities required by the article/code example (e.g. Location, NetworkServices. -->
 +
|keywords= qrand
 +
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|review-by= <!-- After re-review: [[User:username]] -->
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|update-by= <!-- After significant update: [[User:username]]-->
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|creationdate= 20090408
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|author= [[User:Tepaa]]
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<!-- The following are not in current metadata -->
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|subcategory= Base/System
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|id= CS001350
 
}}
 
}}
  
 
==Overview==
 
==Overview==
  
This code snippets shows how random integer value in Qt for S60.
+
This code snippet shows how to generate a random integer in Qt.
 
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'''Note''': In order to use this code, you need to have Qt for S60 installed on your platform.
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+
  
 
==Preconditions==
 
==Preconditions==
  
* Install Qt for S60 Garden release from here: [http://pepper.troll.no/s60prereleases/ Qt for S60 "Garden" pre-release]
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* Install [[Qt SDK]]
* Check this link for installation guide: [http://pepper.troll.no/s60prereleases/doc/install-s60.html How to install the package]
+
 
+
 
+
  
 
==Source==
 
==Source==
  
<code cpp>
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<code cpp-qt>
 
#include <QGlobal.h>
 
#include <QGlobal.h>
 +
#include <QTime>
  
 
int QMyClass::randInt(int low, int high)
 
int QMyClass::randInt(int low, int high)
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</code>
 
</code>
  
<code cpp>
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<code cpp-qt>
// Random value between 0-100
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 +
// 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);
 
int randomValue = randInt(0,100);
 
</code>
 
</code>
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==Postconditions==
 
==Postconditions==
Number ramdomed.
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A random number is given.
  
  
[[Category:Qt]][[Category:Qt for S60]][[Category:Code Examples]][[Category:UI]]
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[[Category:Code Snippet]][[Category:MeeGo Harmattan]] [[Category:Symbian]]

Latest revision as of 04:16, 11 October 2012

Article Metadata
Tested with
Devices(s): Nokia 5800 XpressMusic
Compatibility
Platform(s): S60 3rd Edition, FP1, FP2
S60 5th Edition
Symbian
Article
Keywords: qrand
Created: tepaa (08 Apr 2009)
Last edited: hamishwillee (11 Oct 2012)

Contents

[edit] Overview

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

[edit] Preconditions

[edit] 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);


[edit] Postconditions

A random number is given.

This page was last modified on 11 October 2012, at 04:16.
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