Use of C + + classes Note

When we create a class, we sometimes want to initialize the members of the class to 0, if we say Class A, we define a m_a, we can be simple and practical memmset (&m_a,0,sizeof (A)); This usage is wrong, and when we actually create an object of a class, the object of the class has a function table.  We clear 0 will invalidate these tables, in which case the result is often the program's memory access error. So we can go to struct to do this 0, but be careful with any memory operation of the class.

Use of C + + classes Note