/* Passing function names as arguments */

#include <stdio.h>

#define	ROWSIZE	3
#define	COLSIZE	4

main()
{
  double arrmin(double [], int),
	 arrmax(double [], int),
	 sum_square(double (*f)(double [], int), double [][COLSIZE], int, int);
  double numbers[ROWSIZE][COLSIZE] = {{8, 5, 12, 10}, {2, 7, 2, 6},
					{9, 6, 3, 1}};

  printf("%s%10.3f\n%s%10.3f\n",
	 "First computation: ", sum_square(arrmin, numbers, ROWSIZE, COLSIZE),
	 "Second computation: ", sum_square(arrmax, numbers, ROWSIZE, COLSIZE));
}

double sum_square(double (*f)(double [], int), double darray[][COLSIZE],
		  int m, int n)
{
  int k;
  double sum = 0.0;

  for (k =0; k < m; ++k)
    sum += f(darray[k], n) * f(darray[k], n);
  return sum;
}

double arrmin(double val[], int n)
{
  int i;
  double min = val[0];

  for (i = 1; i < n; ++i)
    if (val[i] < min)
	min = val[i];
  return min;
}

double arrmax(double val[], int n)
{
  int i;
  double max = val[0];

  for (i = 1; i < n; ++i)
    if (val[i] > max)
	max = val[i];
  return max;
}