Splving a strings

#1

Why pair of string have used in the program of the sort the strings.
There may be more than 2 strings also. So why pair is used ??
Please explain ?

#2

And in case of reversal can we applt reverse function

#3

hi, do you remember how we solve bubble sort?
we compare every adjacent pair, and decide to swap or not , to arrange the elements in the order we want.
at a time we only compare two elements. right?

same way sort() function works. it calls your function compare() by passing it a pair, and decides the order between these two objects. it calls this function for every possible pair, so that the order can be decided for any number of objects.

thanks