title: What benefit I will get to create an abstract class rather than the base class in CPP?
body: <p>In our project - C++, we have the generic module called "ContentCache". From this contentcache, we have derived the customer specific contentcache - for example - Airtel, TataSky. For example, the base contentCache has the method - create the database table, store the basic information. The other types of contentcache which has a relationship like airtel content cache is a type of contentcache. This airtel content cache is customized - overriden a few methods. However, the rest of it are the same. On a few products, we simply use the generic - contentCache. My question is do we need an abstract class - ContentCache - IcontentCache. Also, what is the good way - creating an abstract class or just create a generic base class. What advantage do we get with the IContentCache- i.e. abstract class. I am looking an answer from the design pattern point of view. Also, the programming point of view. </p>