Qt: Global String Calling Issue

elfenliedtopfan5

Ok i am new to QT and been playing around and watching tutorials but i having issues reverencing a string i want to make global,

here is my .H

#ifndef ELFENLIEDTOPFAN5RES_H
#define ELFENLIEDTOPFAN5RES_H
#include <QString>


class ELFENLIEDTOPFAN5RES
{
public:
ELFENLIEDTOPFAN5RES();
static QString BO3_Path;
};




#endif // ELFENLIEDTOPFAN5RES_H

and here is the cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMessageBox>
#include <QStatusBar>
#include "elfenliedtopfan5Res.h"


ELFENLIEDTOPFAN5RES::ELFENLIEDTOPFAN5RES()
{
    ELFENLIEDTOPFAN5RES::BO3_Path = (QString(getenv("TA_GAME_PATH")).replace('\\', '/'));

}


MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

}


MainWindow::~MainWindow()
{

    delete ui;
    //const QString elfenliedtopfan5Res::BO3_PATH = (QString(getenv("TA_GAME_PATH")).replace('\\', '/'));
}



void MainWindow::on_pushButton_clicked()
{
    QString elfen2 = ELFENLIEDTOPFAN5RES::BO3_Path;
   QMessageBox::information(this,"title",elfen2);
}

this is the error it throws,
mainwindow.cpp:-1: error: undefined reference to `ELFENLIEDTOPFAN5RES::BO3_Path'

but unsure of why its doing this i have tried multiple things and looked on loads of global string setups but still no avail
sorry if its a noob question
thank you for reading
elfenliedtopfan5

Christian Ehrlicher

Basic c++ - a static variable needs to be properly initialized. You only declared that there is a static variable but did not define it.

SGaist

Hi and welcome to devnet,

Move that line out of the constructor. Initializing a static class variable is not done there.

By the way, Qt provides functions to get environment variables.

elfenliedtopfan5

@Christian-Ehrlicher Thank you sorry i am really new to QT and c++ is not my native language c# is so get little confused but than you for reply :)