How to convert QString to std::string ?

convert the QString to std::string:

QString qs;  
 
// Either this if you use UTF-8 anywhere
std::string utf8_text = qs.toUtf8().constData();
 
// or this if you're on Windows 
std::string current_locale_text = qs.toLocal8Bit().constData();

Try this link:

http://doc.qt.io/qt-5/qstring.html#toLatin1

Just convert QString to std::string:

QString qs;
// do things
 
std::cout << qs.toStdString() << std::endl;

Debugging messages to the console, you can use qDebug().

 qDebug()<<string; which will print the contents to the console.

This is the easy way  to convert std::string for debugging messages