#include <stdio.h>
#define NROWS 8
#define NCOLS 7
#define FILENAME "power1.txt"
int main(void)
{
/* Declare variables. */
int i, j;
int power[NROWS][NCOLS], col_sum;
FILE *file_in;
/* Read information from a data file. */
file_in = fopen(FILENAME,"r");
if (file_in == NULL)
printf("Error opening input file. \n");
else
{
for (i=0; i<=NROWS-1; i++)
for (j=0; j<=NCOLS-1; j++)
fscanf(file_in,"%d",&power[i][j]);
/* Compute and print daily averages. */
for (j=0; j<=NCOLS-1; j++)
{
col_sum = 0;
for (i=0; i<=NROWS-1; i++)
col_sum += power[i][j];
printf("Day %d: Average = %.2f \n",j+1,(double)col_sum/NROWS);
}
fclose(file_in); /* Close file. */
}
return 0; /* Exit program. */

}