Call a non-const member function from a const member function

Question

I would like to know if its possible to call a non-const member function from a const member function. In the example below First gives a compiler error. I understand why it

Answer 1

By the definition of const, a function should not modify the state of an object. But if it calls another non-const member, the object's state might get changed, so it's disallowed.

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