March 6, 2012

Qt : conversion in binary, decimal and hex

By totosugito C++/Qt 5 Comments

Qt : conversion in binary, decimal and hex

This is a basic article for Qt : conversion in binary, decimal and hex. From this tutorial, you can know how Qt : conversion in binary, decimal and hex. Qt have rich class to convert from a data from one data type to other. From this tutorial, I am use QString class to convert a number to binary, decimal and hex number.

Please check this main.cpp code :

#include <QCoreApplication>
#include <QDebug>
#include <QString>

int main(int argc, char *argv[])
{
	QCoreApplication a(argc, argv);
	bool ok;

	QString str = "FF";
	qDebug()<<"Input (HEX)       = " << str;

	int iVal = str.toInt(&ok,16);
	QString binnumber = str.setNum(iVal, 2);

	qDebug()<<"Convert to Int    = " << QString::number(iVal);
	qDebug()<<"Convert to Binary = " << binnumber;

	return (0);
}

#include <QCoreApplication>

#include <QDebug>

#include <QString>

int main(int argc, char *argv[])

{

QCoreApplication a(argc, argv);

bool ok;

QString str = "FF";

qDebug()<<"Input (HEX) = " << str;

int iVal = str.toInt(&ok,16);

QString binnumber = str.setNum(iVal, 2);

qDebug()<<"Convert to Int = " << QString::number(iVal);

qDebug()<<"Convert to Binary = " << binnumber;

return (0);

}

This is contents for the *.pro file :

TEMPLATE = app
TARGET = qt_listdir 

QT        += core 

HEADERS   +=
SOURCES   += main.cpp
FORMS	  +=
RESOURCES +=

TEMPLATE = app

TARGET = qt_listdir

QT += core

HEADERS +=

SOURCES += main.cpp

FORMS +=

RESOURCES +=

This is an output from this Qt : conversion in binary, decimal and hex code :

toto@toto-laptop:/data/Project/qtproject$ ./convert_data
Input (HEX)       =  "FF"
Convert to Int    =  "255"
Convert to Binary =  "11111111"

toto@toto-laptop:/data/Project/qtproject$ ./convert_data

Input (HEX) = "FF"

Convert to Int = "255"

Convert to Binary = "11111111"

Tags:Qt Convert binary, Qt Convert Decimal, Qt Convert HEX

5 Comments

Muhammad Ijaz

Thank you very much for this tutorial.
There are some issue in this.
If you will convert hex 0x7FFFFFFF to int, binary it retruns 0.
why?
October 28, 2019 Reply

Muhammad Ijaz

Thank you very much for this tutorial.
There are some issue in this.
1) If you will convert hex 0x7FFFFFFF to int, binary it retruns 0 only.
why?
October 28, 2019 Reply

Muhammad Ijaz

if you will convert hex 0x7FFFFFFF to int, binary it retruns 0 only.
why?
October 28, 2019 Reply
Muhammad Ijaz

What is this, my comment automatically edited. I write something else but comment post is skips some of the lines…
October 28, 2019 Reply

totosugito

Try to use 7FFFFFFF not 0x7FFFFFFF .
Please check the sample main.cpp code.
October 28, 2019 Reply

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Qt : conversion in binary, decimal and hex

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