The test program for the Exercise 2-2 and the implementation of the complex multiplication and division can be found here
The result for exercises 2-5, 2-6 and 2-7 can be found here
This is the Header File for Exercise 2-8. You find additional information in this header file! The header file includes the class MyString, you can use your own created String class or take the result String class from exercises 2-5, 2-6 and 2-7.
Additional information and a test program for Exercise 2-14 can be found here.