Add dereference and arrow operators to your StrBlobPtr class and to the ConstStrBlobPtr cl...

Add dereference and arrow operators to your StrBlobPtr class and to the ConstStrBlobPtr class that you defined in exercise 12.22 from § 12.1.6 (p. 476). Note that the operators in constStrBlobPtr must return const references because the data member in constStrBlobPtr points to a const vector.

§ 12.1.6 (p. 476)

Exercise 12.19

Define your own version of StrBlobPtr and update your StrBlob class with the appropriate friend declaration and begin and end members.

Exercise 12.20

Write a program that reads an input file a line at a time into a StrBlob and uses a StrBlobPtr to print each element in that StrBlob.

Exercise 12.22

What changes would need to be made to StrBlobPtr to create a class that can be used with a const StrBlob? Define a class named ConstStrBlobPtr that can point to a const StrBlob.