Qt5 C++ GUI Programming Cookbook - Second Edition

How to do it...

Let's learn how to convert various data types in Qt by following these steps:

1. Open Qt Creator and create a new Qt Console Application project by going to File| New File or Project:

2. Open main.cpp and add the following headers to it:

#include <QCoreApplication>#include <QDebug>#include <QtMath>#include <QDateTime>#include <QTextCodec>#include <iostream>

3. In the main() function, add the following code to convert a string into a number:

int numberA = 2;QString numberB = "5";qDebug() << "1) " << "2 + 5 =" << numberA + numberB.toInt();

4. Convert a number back into a string:

float numberC = 10.25;float numberD = 2;QString result ...