// The switch statement in this program uses the "fall through"
// feature to catch both uppercase and lowercase letters entered
// by the user.
#include <iostream>
using namespace std;

int main()
{
   char feedGrade;
   
   // Get the desired grade of feed.
   cout << "Our dog food is available in three grades:\n";
   cout << "A, B, and C. Which do you want pricing for? ";
   cin >> feedGrade;
   
   // Display the price.
   switch(feedGrade)
   {
      case 'a':
      case 'A': cout << "30 cents per pound.\n";
                break;
      case 'b':
      case 'B': cout << "20 cents per pound.\n";
                break;
      case 'c':
      case 'C': cout << "15 cents per pound.\n";
                break;
      default:  cout << "That is an invalid choice.\n";
   }
   return 0;
}