#include <stdio.h>

void f (int n, int a[n], int *sum, int *largest);

int main() {

   int array[] = {1, 2, 3, 4, 5};

   int sum, *sum_p = &sum;
   int largest, *largest_p = &largest;

   f(5, array, sum_p, largest_p);

   printf("Sum = %d\nLargest = %d\n", sum, largest);

   return 0;

}

void f(int n, int a[n], int *sum, int *largest) 
{
   int *ip;

   *largest = *a;

   *sum = 0;

   for (ip = a; ip < (a+n); ip++) {
      *sum += *ip;
      if (*ip > *largest) {
         *largest = *ip;
      }
   }
}