/* A program to store numbers in an array and compute their maximum.
 * This code illustrates the use of arrays within functions. 
 */

#include <stdio.h>

#define LENGTH 10  /* number of elements to be processed in array */

/* Calculate and return the maximal number in an array */
double find_max(double array[], int array_size)
{
  double max = array[0];    /* start with first array value */
  
  /* compare maximum with previous values, updating as needed */
  for (int j = 1; j < array_size; j++)
  {
    if (array[j] > max)
      max = array[j];
  }

  return max;
}

/* Declare and initialize a list of numbers, printing them and their maximum */
int main(void)
{
  printf("Program to process real numbers.\n");
  
  /* declare array of LENGTH values  */
  double numbers[LENGTH] = {3, 1, 4, 1, 5, 9, 2, 6, 5, 3};
  
  double bigNumber = find_max(numbers, LENGTH);
  
  printf("The maximum of ");

  for (int i = 0; i < LENGTH; i++)
    printf(" %5.2lf", numbers[i]);
  printf("\n");
  
  printf("is %5.2lf\n", bigNumber);
  
  return 0;
}