Yahoo Interview Question for Software Engineer / Developers






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class PoweredDevice
{
public:
PoweredDevice(int nPower)
{
cout << "PoweredDevice: " << nPower << endl;
}
};

class Scanner: virtual public PoweredDevice
{
public:
Scanner(int nScanner, int nPower)
: PoweredDevice(nPower)
{
cout << "Scanner: " << nScanner << endl;
}
};

class Printer: virtual public PoweredDevice
{
public:
Printer(int nPrinter, int nPower)
: PoweredDevice(nPower)
{
cout << "Printer: " << nPrinter << endl;
}
};

class Copier: public Scanner, public Printer
{
public:
Copier(int nScanner, int nPrinter, int nPower)
: Scanner(nScanner, nPower), Printer(nPrinter, nPower), PoweredDevice(nPower)
{
}
};
int main()
{
Copier cCopier(1, 2, 3);
}

here the virtual make sure that powerdevice is call by copier only once..

note:thanks alex @learncpp

- vijaymukilan July 17, 2013 | Flag Reply


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