#include <QtCore>

class Person {
public:
    void setNameV( QString newName) {
        newName += " Smith";                
        m_Name = newName;
    }
    void setNameCR( const QString& newName) {
//      newName += " Python";               
        m_Name = newName;
    }
    void setNameR( QString& newName) {
        newName += " Dobbs";                
        m_Name = newName;
    }
private:
    QString m_Name;
};

int main() {
    Person p;
    QString name("Bob");
    p.setNameCR(name);                       
//  p.setNameR("Monty");                    
    p.setNameCR("Monty");                   
    p.setNameV("Connie");                   
    p.setNameR(name);                       
    qDebug() << name;         
}