#include <stdio.h>

/* Michael A. Redmond                        */
/* PA State Police fine calculation program  */

double calcMPH (double miles, double minutes) {

    const int minPerHour = 60;
	double mph;

    mph = (miles / minutes) * minPerHour;

    return mph;
  }

double calcFine (double mph, int speedLimit) {

	double overLimit;
    if (mph <= speedLimit) {
       return 0;
      }
    overLimit = mph - speedLimit;
    if (overLimit <= 5.0001) {
       return 20;
      }
    if (overLimit <= 10.0001) {
       return (20 + (2 * overLimit));
      }
    if (overLimit <= 20.0001) {
       return (20 + (4 * overLimit));
      }
    else {
       return (50 + (5 * overLimit));
      }

  }


void printBill(double miles,double minutes,double MPH,int speedLimit,double Fine) {
    printf("\n");
    printf("===========================< CUT HERE >===============================\n");
    printf("                               Bill\n");
    printf("\n");
    printf("   You traveled %6.1f miles in %6.1f minutes \n",miles,minutes);
    printf("      - an average speed of %5.1f miles per hour\n",MPH);
    printf("   This compares to a speed limit of %2d \n",speedLimit);
    printf("   The fine of %7.2f has been charged to your account \n",Fine);
    printf("\n");
    printf("===========================< CUT HERE >===============================\n");
    printf("\n");
  }



int main() {

   int numCars;
   int cnt;
   double minutes;
   double miles;
   double currMPH;
   double currFine;
   int speedLimit;

   double totalMPH = 0.0;

   int numSpeeding = 0;

   double totalFines = 0.0;
   double percSpeeding;
   double aveFinePerSpeeding;
   double aveFinePerCar;
   double aveMPH;

   printf("How many cars will be logged in this batch? ");
   scanf("%d",&numCars);

   printf("\n");


   while (numCars <= 0) {
	   printf("Please enter a positive number of cars");
	   scanf("%d",&numCars);
     }

   /* loop through user specified number of cars */
   for (cnt = 0;cnt < numCars; cnt++) { 

      printf("Car %2d \n",(cnt + 1));
      printf("Time on Turnpike (in minutes): ");
      scanf("%lf",&minutes);
	  while (minutes <= 0) {	   
		  printf("\nPlease enter a positive number of minutes");	   
		  scanf("%lf",&minutes);    
	  }

      printf("Miles on Turnpike: ");
      scanf("%lf",&miles);
	  while (miles <= 0) {	   
		  printf("\nPlease enter a positive number of miles");	   
		  scanf("%lf",&miles);    
	  }

      printf("Speed Limit on Turnpike: ");
      scanf("%d",&speedLimit);
	  while ((speedLimit < 35) || (speedLimit > 65)) {	   
		  printf("\nPlease enter a speed limit between 35 and 65");	   
		  scanf("%d",&speedLimit);    
	  }
      printf("\n");

      currMPH = calcMPH(miles,minutes);
      totalMPH += currMPH;

      printf("\nSpeed: %5.1f \n",currMPH);

      currFine = calcFine(currMPH,speedLimit);

      if (currFine > 0.0001) {
         printBill(miles,minutes,currMPH,speedLimit,currFine);
         numSpeeding++;
         totalFines += currFine;
       }

   } // end for loop

   percSpeeding = (numSpeeding / (1.0 * numCars)) * 100.0;

   if (numSpeeding > 0) {
      aveFinePerSpeeding = totalFines / numSpeeding;
     }
   else {
      aveFinePerSpeeding = 0;
     }

   aveFinePerCar = totalFines / numCars;
   
   aveMPH = totalMPH / numCars;

   // final report for batch of cars
   printf("\n");
   printf("\n\n                     Final Report\n");
   printf("                     ------------\n");

   printf("\n");
   printf(" In a batch of %2d cars %2d were speeding \n",numCars,numSpeeding); 
   printf("\n");
   printf(" This represents %6.2f percent of cars \n",percSpeeding);
   printf("\n");
   printf(" The total fines charged were %8.2f \n",totalFines);
   printf(" This represents an average per speeding car of %6.2f \n",aveFinePerSpeeding);
   printf(" OR an average for all cars of %6.2f \n",aveFinePerCar);

   printf("\n The average speed of all cars was %6.2f miles per hour \n",aveMPH);
        
   printf("\n");
   printf("Goodbye \n");

   return 0;

 }