Why delete is needed in the definition of the copy-assignment operator?

Question

I am a C++ beginner. And I am doing the exercises in C++ Primer (5th Edition). I found a reference to Exercise 13.8 from Github (Here), which is shown below.

Answer 1

In C++ programming, calling delete on a class object automatically invokes the destructor of the class.

In general practice, destructor holds the code to free up the resources i.e file pointers,deletion of objects created inside the class.This way, when you call delete on an object,the resources it allocated are freed up i.e given back to the system

If these resources are not freed up,the memory allocated for these resources will not be given back to the system.Every time your object gets called,you lose a certain portion of memory and over a period of time you would have lost a major chunk of memory.This is called as memory leak.

Thus when you call delete on an object,you ensure that the resources you acquired are released, provided you have done those operations in destructor.