/*
   testarr12.cpp
   CIS 150
   06/19/2008
   David Klick

   This program demonstrates how to look up information
   in parallel arrays.
*/

#include <iostream>
#include <iomanip>
using std::cin;
using std::cout;
using std::setw;
using std::left;

void cont();

int main() {
   int n;
   const int ARRAY_SIZE = 4;

   // declare and initialize arrays of names
   // fname array stores first names
   // lname array stores last names
   // These are parallel arrays because the elements
   //    with the same index in each array are related.
   char fnames[][15] = { "Bob", "Carol", "Ted", "Alice" };
   char lnames[][12] = { "Hope", "O'Connor", "Danson", "Springs" };

   // loop until user chooses to exit
   do {
   
      // find out which name the user wants to display
      do {
         cout << "Display which name? (1-4, -999 to exit) ";
         cin >> n;
         if (n == -999) break;
         if (n<1 || n>4) {
            cout << "Error: Invalid entry\n";
         }
      } while (n<1 || n>4);
   
      // display desired name if user didn't choose to exit
      if (n != -999) {
         // actual array entry is 1 less than user entry
         cout << left << setw(10) << lnames[n-1] << fnames[n-1] << '\n';
      }
   } while (n != -999);
   
   cont();
   return 0;
}

/*
   void cont();
   
   Arguments: none
   
   Returns: nothing
   
   Clears input buffer and pauses waiting for user 
   to press Enter.
*/
void cont() {
   if (cin.rdbuf()->sungetc() != -1 && cin.get() != '\n') cin.ignore(80,'\n');
   cout << "Press enter to continue...";
   cin.get();
}

/*
   Sample output:

   Display which name? (1-4, -999 to exit) 5
   Error: Invalid entry
   Display which name? (1-4, -999 to exit) 2
   O'Connor  Carol
   Display which name? (1-4, -999 to exit) 3
   Danson    Ted
   Display which name? (1-4, -999 to exit) -999          
*/