Refactor your part of the code

[alihaider1264]

Make sure:
you don't have any unused variables or pointers.
all pointers should be deleted after use.
you have used meaningful names
you have commented your code properly, professionally and in detail

[alihaider1264]

We will come back to this in the last week.

[alihaider1264]

Have a look at the code in its entirety and make changes where:

1. execution time can be improved
2. space requirement can be improved
3. comments can be added

@Harrison7318 @itstockra This task is for both of you. @itDingle will complete testing #66 in this week of 12/6