/*
   testio3.cpp
   CIS 150
   6/5/2008
   David Klick
   
   This program demonstrates data validation using the
   switch selection structure.
*/

#include <iostream>
using std::cout;
using std::cin;

void cont();

int main(void) {
   char ch;
   bool error = false;
   
   cout << "Enter the letter 'Y': ";
   cin >> ch;
   
   switch (ch) {
   case 'y':
   case 'Y':
      cout << "Thank you\n";
      break;
   default:
      cout << "Invalid character entered\n";
      error = true;
   }
   

   if (error) {
      cout << "Abnormal program termination\n";
   } else {
      cout << "Normal program end\n";
   }
   
   cont();
   return 0;
}

void cont() {
   if (cin.rdbuf()->sungetc() != -1 && cin.get() != '\n') cin.ignore(80,'\n');
   cout << "Press enter to continue...";
   cin.get();
}