/*---------------------------------------------------*/

/*  Program chapter3_7                               */

/*                                                   */

/*  This program generates a summary report from     */

/*  a data file that does not have a header record   */

/*  or a trailer record.                             */



#include <stdio.h>

#define FILENAME "sensor3.dat"



int main()

{

   /*  Declare and initialize variables.  */

   int num_data_pts=0, k;

   double time, motion, sum=0, max, min;

   FILE *sensor3;



   /*  Open file.  */

   sensor3 = fopen(FILENAME,"r");



   /*  While not at the end of the file,  */

   /*  read and accumulate information.   */

   while ((fscanf(sensor3,"%lf %lf",&time,&motion)) == 2)

   {

      num_data_pts++;

      if (num_data_pts == 1)

	 max = min = motion;

      sum += motion;

      if (motion > max)

	 max = motion;

      if (motion < min)

	 min = motion;

   }



   /*  Print summary information.  */

   printf("Number of sensor readings: %i \n",

	  num_data_pts);

   printf("Average reading:           %.2f \n",

	  sum/num_data_pts);

   printf("Maximum reading:           %.2f \n",max);

   printf("Minimum reading:           %.2f \n",min);



   /*  Close file and exit program.  */

   fclose(sensor3);

   return 0;

}

/*---------------------------------------------------*/