// Text file input demo.
// speed.dat contains any number of
// space/enter separated real numbers.

#include <stdafx.h>
#include <iostream>
#include <conio.h>
using namespace std;

void main(void)
{
  FILE * s_d=fopen("c:\\temp\\speed.dat","r");//open file for input
  if(s_d==NULL){ printf("\nFile not found!"); getch(); exit(1); }
  double tmp ,counter=0,sum=0;

  while(1) //read speed data to end of file
  {
		fscanf(s_d,"%lf",&tmp); // read from file 1 number
		if(feof(s_d)) break;
		sum+=tmp;
		counter++;
		cout<<counter<<" "<<tmp<<endl;
  }

  if(counter != 0)
	  cout<<endl<<counter<<" speeds with average "<< (sum/counter)<<endl;

  fclose(s_d);
  getch();
}