Find peaks from array in C

#include <stdio.h>

int getPeaksFromArray(int* nums, int len, int *peaks)
{
	int pi = 0;

	for (int i = 0; i < len; i++)
	{
		if (	(i == 0 && nums[i + 1] < nums[i])		||				/* first element */
				((i == len) && nums[i - 1] < nums[i])	||				/* last element */
				(nums[i] > nums[i - 1] && nums[i] > nums[i + 1])	/* elements in the middle */
			)
		{
			peaks[pi++] = nums[i];
		}
	}
	return pi;
}

int main()
{
	int arr[] = { 1, 3, 20, 4, 9, 10, 16, 70, 20, 4, 1, 9, 6, 3, 80, 89, 98, 88, 60, 85, 74, 80, 2, 5, 3, 9, 6, 7, 8, 9, 12, 3, 8 };
	int peaks[sizeof(arr) / sizeof(arr[0])];
	int pi = 0;

	pi = getPeaksFromArray(arr, sizeof(arr) / sizeof(int), peaks);

	for (int i = 0; i < pi; i++)
		printf("%d\n", peaks[i]);

	return 0;
}