#include <fstream>
#include <iostream>
#include <iomanip>
using namespace std;
 
const int MAXCARS = 12;
        float avgallons = 0;
		int numel = 0;
        float totalmiles, totalgallons;
 
struct Car
{
int number, miles;
float gallons;
float averagegallons;
}Cars;
 
Car Cars[MAXCARS];
 
 
void getdata(int, int, float);
void processdata(int, float);
void sort(float);
void putdata(int, float);
 
ifstream HopeData;
ofstream MikeData;
 
void main()
{
 
HopeData.open("gdata.dat");
MikeData.open("pdata");
 
if(HopeData.fail())
        {
        cout << "\n\nFile not successfully opened\n\n";
       }
cout << "\n\nFile successfully opened\n\n";
 
MikeData << "\n\n              Car Report" << endl;
MikeData << "Number       Average Per Car" << endl;
cout << setiosflags(ios::showpoint);
                cout << setiosflags(ios::fixed);
                cout << setprecision(2);
 
getdata(Cars.number, Cars.miles, Cars.gallons);
putdata(Cars.number, Cars.averagegallons);	
 
MikeData << "\n\nAverage Gallons Used by All Cars is " << avgallons << endl;
}
 
void getdata(int number, int miles, float gallons)
{
        while(HopeData.peek() != EOF)
        {
HopeData >> Cars.number >> Cars.miles >> Cars.gallons;
HopeData.ignore(80,'\n');
 
processdata(Cars.miles, Cars.gallons);
        }
}
 
void processdata(int miles, float gallons)
{
Cars.averagegallons = Cars.miles / Cars.gallons;
totalmiles = totalmiles + Cars.miles;
totalgallons = totalgallons + Cars.gallons;
avgallons = totalmiles / totalgallons;
numels++;
sort(Cars.averagegallons);
}
 
void sort(float averagegallons, int numels)
{
int i,j,min,minidx,temp,moves=0;
 
for(i=0;i<numels;i++)
  {
min = Cars[i];
minidx = i;
 	for(j=i+1;j<numels;j++)
  	{
		if(Cars[j].averagegallons<Cars[i].averagegallons)
		{
		min = Cars[j];
		minidx=j;
		}
		if(min<Cars[i].averagegallons)
		{
       temp=Cars[i];
       Cars[i]=min;
       Cars[minidx]=temp;
	   	}
	}
}
 
}
 
void putdata(int number, float averagegallons)
{
        while(HopeData.peek() != EOF)
        {
MikeData << Cars[].number << "\t     " << Cars[].averagegallons << endl;
        }
}