When we add a static data member in class, it will have only one copy per class.Let us understand with an example.//Header file#include using namespace std;class base { static unsigned int m_classMember; //static data member unsigned int m_objectMember; //nonstatic data memberpublic: base() { m_objectMember = 0; ++ m_classMember; ++ m_objectMember; cout &...