How to write C++ program that reads a list of nine digit number from the keyboard. It stores the numbers in a multiset, and then goes through the set to determine whether there are any duplicate...

How to write C++ program that reads a list of nine digit number from the keyboard. It stores the numbers in a multiset, and then goes through the set to determine whether there are any duplicate entries. For each duplicate entry, print a message that says how many times that entry occurred in the multiset ?