const in C++

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consts in this declaration:

// v───v───v───v───v───v───v───v───v───v───v───v─┬┐//                                               ││//  v──#1    v─#2             v──#3    v─#4      #5   int const * const Method3(int const * const&) const

#5 means that this function must be a member function of a class, and the object which calls this function can not be modified through this call.

#4 means that the pointer is const. That is to say, the pointer can not point to another address.

#3 means that the int is const that it can not have a different value.

#2 means  that this function returns a const pointer, like #4.

#1 means that this function returns a const int, like #3.