Russian Qt Forum

C++ (Qt)
class A
{
public:
    void set(QString s) { str = s; }
    QString get() { return str; }
 
protected:
    QString str;
};
 
class B : public A
{
public:
    void set(QString s){ str = s; }
    void setB(QString s){ strB = s; }
    QString get(){ return str; }
    QString getB(){ return strB; }
 
protected:
    QString strB;
 
};
 
class C : public A
{
public:
    void set(QString s){ str = s; }
    void setC(QString s){ strC = s; }
    QString get(){ return str; }
    QString getC(){ return strC; }
 
protected:
    QString strC;
 
};
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
 
    QMap<QString, A> map;
    B b;
    b.set("class B set");
    C c;
    c.set("class C set");
 
    map.insert("B",b);
    map.insert("C",c);
 
    QString bb = map["B"].get();
    QString cc = map["C"].getC(); // error: 'class A' has no member named 'getC'
 
    qDebug() << map.size() << " " << bb << " " << cc;
 
    return a.exec();
}