added program to find second largest/smallest element in array using c++ - #80

added program to find second largest/smallest element in array using c++#80

i-arshii wants to merge 1 commit into

itsharshitb:masteritsharshitb/Hacktober_Fest:masterfrom

i-arshii:masteri-arshii/Hacktober_Fest:masterCopy head branch name to clipboard