Question

Program to find average of numbers stored in sequential access file

Answer 1

Answer:

Answer: Average of numbers stored in sequential access files is the total sum that comes in the ended which is divided by the group size. Explanation: The first number refers to the size of the group. Taking that number, the loop is made and through that number other numbers are accessible.

Answer 2

find average of numbers stored in sequential access file

#include <stdio.h>

#include <stdlib.h>

#define DATAFILE "prog15.dat"

int main() {

 FILE* fp;

 int n[50], i = 0;

 float sum = 0;

 if ((fp = fopen(DATAFILE, "r")) == NULL) {

   printf("Unable to open %s...\n", DATAFILE);

   exit(0);

 }

 puts("Reading numbers from num.dat");

 while (!feof(fp)) {

   fscanf(fp, "%d ", &n[i]);

   printf("%d %d\n", i, n[i]);

   sum += n[i];

   i++;

 }

 fclose(fp);

 // if no data is available in the file

 if (i == 0)

   printf("No data available in %s", DATAFILE);  

 float average = sum / i;

 printf("The average is %.3f for %d numbers\n", average, i);

 return 0;

}

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