Help with classes

[Coby Russell]

3. Given the following class,

class CBase
{
protected:
int m_anInt;
public:
CBase(int n): m_anInt(n) { cout < < "Base constructor\n"; }
virtual void Print() const = 0;
};
what sort of class is CBase and why? Derive a class from CBase that sets its inherited integer
value, m_anInt , when constructed, and prints it on request. Write a test program to verify that
your class is correct.

[Smac89]

Read the section on abstract base classes:
http://www.cplusplus.com/doc/tutorial/polymorphism/

Read more here:
http://www.learncpp.com/cpp-tutorial/126-pure-virtual-functions-abstract-base-classes-and-interface-classes/

[Coby Russell]

So what is Cbase i guess my biggest problem is im not understanding all the "lengo" in this class and the teacher is not much help

[Stewbond]

Since it's an obvious copy+paste question, here's an answer in the wrong language:

class CDerived extends CBase {
  public CDerived()  {
    super( 1 );
  }

  @Override
  public void Print() { System.out.print( m_anInt ); }

  public int main(String[] argv) {
    CDerived obj = new CDerived();
    obj.Print();
    return 0;
  }
}

But the point is that CBase is abstract, which means that you cannot make an object from it. You can only create an object from a class which inherits from CBase. You know it's abstract because:
virtual void Print() const = 0;

This says that any class which derives from CBase MUST provide a void Print() const function.

[Coby Russell]

Wrong language? whats the right one LOL

[Little Bobby Tables]

considering the forum, im assuming the right one is php. thats some damn fine python stewbond.

[Stewbond]

My next answer will be in lua.