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Is This Valid C++?

sdj
sdj asked
on
256 Views
Last Modified: 2010-04-01
Environment Visual C++ 5.0.

This compiles and appears to run OK but I was wondering whether it is valid (or good) C++. And if not is there a better way to do it?

class COther
{

protected:
      int x;
      int y;

public:
      COther();
      ~COther();
      virtual void set_values(int px,int py)
      {
            x = px;
            y = py;
      }
};

class A
{

protected:
      COther* other_class;

public:
      virtual void do_work()
      {
            other_class = new COther;
            other_class->set_values(2,4);
      }
};

class CNewOther : public COther
{
      int z;

public:
      CNewOther();
      ~CNewOther();
      virtual void set_values(int px,int py)
      {
            y = px;
            x = py;
            z = y*x;
      }
};

class B : public A
{
      virtual void do_work()
      {
            other_class = new CNewOther;
            other_class->set_values(2,4);
      }
};

This is a simple example of the actual code that has been written. It just struck me that this might potentially cause problems because the declared pointer is not the same as the instantiated type for the other_class object.

Any comments?
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