/* This program determines the amount a customer pays for gasoline,
   given the amount of groceries the cusomter purchased in the past
   two weeks, the posted price per gallon, and the number of gallons.

   Pre-condition:  factors have been identified at the start of the program
                   the total groceries, the pricer per gallon, and the 
                   number of gallons are non-negative
   Post-condition: the program prints 
                      the total cost of the gasoline, before discount,
                      the total discount earned by the customer, and
                      the total amount the customer actually paid

   Acknowledgment: This source skeleton was originally written by Henry Walker.
*/

#include <stdio.h>

int main ()
{
  double groceriesPurchased = 123.45; /* total groceries purchased in 2 weeks */
  double pricePerGallon     =   3.21; /* price of a gallon of gasoline        */
  double gallonsPurchased   =  14.51; /* total gallons purchased              */

  printf ("program is incomplete\n");

  return 0;
}