/* Program CNT_OCC2.C
**
** Counts the occurances of number at specified index in an array.
**
** Peter H. Anderson, MSU, Feb 21, '97
**
*/

#include <stdio.h>

int count_occur2(int a[], int num_elements, int index);
void print_array(int a[], int num_elements);

void main(void)
{
   int a[10] = {1, 2, 0, 0, 4, 5, 6, 9, 9, 17};
   int index, num_occ;

   printf("\nArray:\n");
   print_array(a, 10);

   for(index=0; index<10; index++)
   {
	  num_occ = count_occur2(a, 10, index);
	  printf("The value at index %d was found %d times.\n", index,
num_occ);
   }
}

int count_occur2(int a[], int num_elements, int index)
/* checks array a for number of occurrances of value at specified index */
{
   int i, count=0, value;
   value=a[index];
   for (i=0; i<num_elements; i++)
   {
	 if (a[i] == value)
	 {
		++count; /* it was found */
	 }
   }
   return(count);
}

void print_array(int a[], int num_elements)
{
   int i;
   for(i=0; i<num_elements; i++)
   {
	 printf("%d ", a[i]);
   }
   printf("\n");
}