Stream function question

Can anyone tell me why my fuction does not return anything when the program is run? It compiles correctly but it wont output anything...

Code:

#include <iostream.h> 	// for output to screen
#include <fstream.h>  	// for file I/O
#include <stdlib.h>	// for exit function

void read_file(ifstream& fin, double& sum, double& count);

void main()
{
double sum=0;   // accumulates sum of values in file
double count=0; // counts number of values read
ifstream fin; 	// input file stream

fin.open("input.dat");
if (fin.fail())
{
   cout << "Error opening file input.dat\n";
   exit(1);
}

 read_file(fin, sum, count);
}

void read_file(ifstream& fin, double& sum, double& count)
{
  int next;

  fin >> next;
while (!fin.eof())
{
    count++;
   sum += next;
   fin >> next;
}
cout << "Number of values read: " << count << endl;
cout << "Sum of values read: " << sum << endl;
cout << "Average value: " << sum/count << endl;

}

Code:

void main()

should be

Code:

int main()