/*
   testsel3.cpp
   CIS 150
   6/5/2008
   David Klick
  
   Demonstration of if/else range checking.
*/

#include <iostream>
#include <iomanip>
using std::cout;
using std::cin;
using std::fixed;
using std::setprecision;
using std::showpoint;

void cont();

int main(void) {
   double DISC_PCT = 0.0;
   double price = 12.00;
   bool valid = true;   // assume valid unless we get error
   
   cout << "Ticket Seller 2000\n\n"
        << "Tickets are $" << fixed << showpoint
        << setprecision(2) << price << " each.\n\n"
        << "Discount percentage (0 to 15): ";
   cin >> DISC_PCT;
   if (DISC_PCT < 0.0 || DISC_PCT > 15.0) {
      cout << "Error: invalid discount percentage\n";
      valid = false;
   } else {
      price *= (1 - DISC_PCT/100.0);
   }
      
   if (valid) {
      cout << "The amount due is $" << price << '\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();
}