You'll be enrolled at LMU Munich â Germany's #1 ranked university, take language courses at JYM, and design your own program of study.
Undefined is defined. Define means to set the limits, explain. So, undefine means not to set limits or not to explain.
In the first case (calling the subobject's class method straight through the pointer to the class object), the fact of the pointer being equal to null also corresponds to undefined behavior, and the check is not added here.