Added header guards
Merge branch 'master' of https://github.com/lylemoffitt/CS240_Lab06

# By TaniaNsouli
# Via TaniaNsouli
* 'master' of https://github.com/lylemoffitt/CS240_Lab06:
  Added the element constructor
N/a
Merge branch 'master' of https://github.com/lylemoffitt/CS240_Lab06

# By TaniaNsouli
# Via TaniaNsouli
* 'master' of https://github.com/lylemoffitt/CS240_Lab06:
  Update Lab06.cpp
Merge branches & added Makefile

Following is auto-summary from GitGui:
* 'master' of https://github.com/lylemoffitt/CS240_Lab06:
  Update Lab06.cpp
  Update Lab06.h
  Update Lab06.cpp
  Updates to header

Conflicts:
	Lab06.cpp