// This program demonstrates the  + operator
// concatenate strings -- append one to the other
// also demonstrate subscripting []
// We also see the use of the assignment operator =
// Summary of operators that work on strings:
//  +, =, [], relational operators

// LAB1 for Today:
// Write a program to read in strings (loop)
// If the length of the string is > 10
//      print "that is long"
// otherwise
//      print "thank you."
// time permitting:
// do it both allowing spaces and not allowing spaces
#include <iostream>
#include <string>
using namespace std;

int main()
{
   string firstname, lastname, fullname;
   // initialize a string object
   string str, str2 = "Good Bye";
   string str3;

   str = "Hello ";
   cout << "What is your first name? ";
   cin >> firstname;
   cout << "What is your last name? ";
   cin >> lastname;
   fullname = lastname + ',' + firstname;

   cout << str << fullname << '!' << endl;
   cout << "the length of your name is: " << fullname.length()-1 << '.' << endl;

   string noun;
   cout << "enter a noun: ";
   cin >> noun;
   // same as: noun = noun+"s";
   noun += "s";

   // Wrong! assigning to a string literal
   // "S" += noun;

   cout << "Plural: " << noun << endl;
   for (int i=0; i<str2.length(); i++)
     cout << str2[i] << endl;

   str2[0] = 'H'; // must use single quotes
   cout << str2 << ' '  << firstname << ' ' << lastname << endl;

   string name;
   while (name!="done") {
    cout << "enter a name, done to finish: ";
    cin >> name;
   }

// Wrong: You cannot + two C-strings
// string s2 = "Hello " + "to you.";
   string s="aac";

   if (s < "abb")
     cout << "aac is less than abb";
   else
     cout << "abb is less than aac";

   return 0;
}