#include<stdio.h>
#include<stdlib.h>
#include<math.h>

#define MAX 1000

int n,m,M,events[MAX];
float sum, y, a;
FILE *fptr;

main(int argc, char *argv[]){
    if ((fptr = fopen (argv[1], "r")) == NULL)
    {
      printf ("No such file \n");
      exit (0);
    }

    n=0;
do
    {
      fscanf (fptr, "%d", &events[n]);
      n = n + 1;
    }
  while (!feof (fptr));
 n=n-1; /* we overcounted by incrementing n before testing for eof */
 printf("we got %d data points\n", n);

 sum=0.0;
 for(m=0;m<n;m++){
     sum=sum+events[m];
 }
 sum=sum/(float)n;
 printf("Average is %f\n", sum);
     

 fclose(fptr);
}