cosnt int cool = 50;
int const cool = 50;

These two are the same

cosnt int *cool = 50;
int const *cool = 50;

These two also

For const char* pointer, if we copy the address to another pointer, can I dereference it and then modify it?

Answer: No!

int a = 10;
int *p;
const int *q;
q = &a;
//p = q;
//Invalid conversion from const int* to int*

const override final

const should before override

But final doesn’t

You can delete a nullptr

Member function can access the private data members that is the object of the same class

You cannot inheritage a class prototype

We can overload function for const and non const

double operator[](int) const;
double &operator[](int);