/*--------------------------------------------------
created by st10 at Wed Mar 10 13:49:43 PST 2010
--------------------------------------------------*/
#include <iostream>
#include <cmath>
using namespace std;


/*--------------------------------------------------
 Contract: pretty_name : string string -> string
 Purpose: expects a first name and a last name,
             and it produces a single string
             that is <last_name>, <first_name>
             (the last name, then a comma and a blank,
             and then the first name)

 Examples: pretty_name("Frank", "Rizzo") == "Rizzo, Frank"
--------------------------------------------------*/

string pretty_name(string first, string last)
{
    return last + ", " + first;
}