How to declare a global changeable variable?

[GCDX]

@JonB @mrjj Hmm this is interesting, however, i read the QSettings documentation and i am a little confused. How does QSettings store a permanent change? If not shouldn't i used QSettings instead of the extern global variable??

[mrjj]

@GCDX
QSetting could also be used. Not a bad idea.
On linux it stores in a ini file pr default. on Windows , in registry.

https://wiki.qt.io/How_to_Use_QSettings