C++ expert needed

Type a program to find needed/searched elements from a set and
minimum, maximum values of the same set.
Tasks:
I-Get the set from the user as input.
2-Find the minimum value of the set and display it.
3-Find the maximum value of the set and display it.
4-Find the needed/searched element requested by the user among the
set elements.
Consider the below 2 cases and respond/display accordingly to the
user:

CASE 1: Needed element could not be found.
CASE 2: Needed element found and it is repeated x times.