Look up table: warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11

cdwijs

Hi All,
I want to make a look up table, that is used in two functions in the program. The following gives these warnings. What does this warning mean, and how can I get rid of it?
Cheers,
Cedric
My versions:
Windows 7 enterprise SP1 64 bit
Qt Creator 3.6.0 Based on Qt 5.5.1 (MSVC 2013, 32 bit)
QT5.5, mingw492_32

C:\somewhere\Qt-tutorials\look-up-table\mainwindow.h:21: warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11
     };
     ^
C:\somewhere\Qt-tutorials\look-up-table\mainwindow.h:21: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

    const unsigned short myLut[8]=
    {
        0,      0x3f80, 0x4000, 0x4040, 0x4080, 0x40a0, 0x40c0, 0x40e0,
    };

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

jsulm

@cdwijs said in Look up table: warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11:

const unsigned short myLut[8]=
{
0, 0x3f80, 0x4000, 0x4040, 0x4080, 0x40a0, 0x40c0, 0x40e0,
};

Here you initialize a non-static class member directly inside the class. This is supported in C++11 standard but not before C++11. You either should move the initialization to the constructor or activate C++11 as suggested in the warning message. Put this in your .pro file:

CONFIG += c++11