Define a derived class , CameraPhone that contains two data members: an integer  named , imageSize, representing the size in megapixels of each picture, and an integer  named  memorySize, representing the number of gigabytes in the camera’s memory.

LANGUAGE: C++

CHALLENGE:

Assume  the existence of a Phone class . Define a derived class , CameraPhone that contains two data members: an integer  named , imageSize, representing the size in megapixels of each picture, and an integer  named  memorySize, representing the number of gigabytes in the camera’s memory. There is a constructor  that accepts two integer  parameters  corresponding to the above two data members and which are used to initialize  the respective data members. There is also a function named  numPictures that returns (as an integer ) the number of pictures the camera’s memory can hold.

SOLUTION:

class CameraPhone :public Phone {
    public:
    CameraPhone(int, int);
    int numPictures();
    private:
    int imageSize;
    int memorySize;
};

CameraPhone::CameraPhone(int myimageSize, int mymemorySize) {
    imageSize  = myimageSize;
    memorySize = mymemorySize;
} 

int CameraPhone::numPictures() {
    return memorySize /  imageSize;
}