15. Explain how nested class objects can be defined and accessed using file commands. 16. What are the scoping rules for the nested class objects when using a file? 1. Write a program in C++ to read a...

15. Explain how nested class objects can be defined and accessed using file commands.

16. What are the scoping rules for the nested class objects when using a file?

1. Write a program in C++ to read a file and to (i) display the contents of the file on to the screen,

(ii) display the number of characters; and (iii) the number of lines in the file.

2. Write a program in C++ to read a file and to display the contents of the file on the screen with line numbers.

For example,

1 this is a test

2 program

3 -------

4 -------

3. Write a program in C++ to merge two files into a one file heading.