//------------------------------------------------------
//  Assignment #2 - Gas Station                        -
//                                                     -
// Written By : Jared Justice                          -
// Due Date: September 26, 2008                        -
//                                                     -
// Purpose: Calculate the price of gas, the price      -
//          of carwash after the discount, and         -
//          number or award points earned              -
//------------------------------------------------------



// ----Preprocessor Section----

   #include <iostream>
   #include <iomanip>
   using namespace std;

// ----Main Function----

   int main ()
   {

// ----Variables----

   float
      gallons,           // the number of gallons purchased
      numdis,            // the number of discount points recieved
      carwash = 6.00,    // the number you pay for the original wash
      discount,          // actual cost of carwash after discount      
      cost;              // price of gas 

   char
     typegas;            // regular, premium, or supreme

// ----Input Phase----

   cout << "\n Enter number of gallons----->    ";
   cin >> gallons;
   cout << "\n Type of gas (r for regular, p for premium, and s for supreme)---->";
   cin >> typegas;
   


// ----Processing Phase----
 
   if(typegas == 'r' || typegas == 'R')
   { cost = 3.399 * gallons,
     numdis = 3 * static_cast<int>(gallons);
   }
   else if (typegas == 'p' || typegas == 'P')
   { cost = 3.539 * gallons,
     numdis = 4 * static_cast<int>(gallons);
   }
   else if (typegas == 's' || typegas =='S')
   { cost = 3.679 * gallons,
     numdis = 5 * static_cast<int>(gallons);
   }


   if(gallons <= 5)
     discount = carwash;
   else if(gallons <= 6)
     discount = carwash - (.10 * carwash);
   else if(gallons <= 7)
     discount = carwash - (.20 * carwash);
   else if(gallons <= 8)
     discount = carwash - (.30 * carwash);
   else if(gallons <= 9)
     discount = carwash - (.40 * carwash);
   else if(gallons <= 10)
     discount = carwash - (.50 * carwash);
   else if(gallons <= 11)
     discount = carwash - (.60 * carwash);
   else if(gallons <= 12)
     discount = carwash - (.70 * carwash);
   else if(gallons <= 13)
     discount = carwash - (.80 * carwash);
   else if(gallons <= 14)
     discount = carwash - (.90 * carwash);
   else if(gallons <= 15 || gallons >= 15)
     discount = carwash - (1.00 * carwash);
// ----Output Phase----
  cout << fixed;    
  cout << setprecision (2);

  cout << "\n\n Welcome to the VWC gas pump!";
  cout << "\n\n This is how much you pay for gas     $"  << cost;
  cout << "\n\n Price of Carwash is  $ "<< discount;
  cout << "\n\n Number of award points earned ---->  " << numdis;

return 0;
}