// par20_ex1_t4.c SJ

#include <stdio.h>
#include <stdlib.h>

int * reverse_copy(int *A, int N);

int main(int argc, char *argv[]) {

	int N = 20;
	int i;
	int *A = NULL, *B = NULL;

	if (argc > 1)	// first command line parameter
        N = atoi(argv[1]);

	// allocate, fill, and print input array
	A = (int*) malloc(N * sizeof(int));
	for (i = 0; i < N; i++)
		A[i] = i*i;

	printf("Original array:");
	for (i = 0; i < N; i++)
		printf(" %d", A[i]);
	printf("\n");

	// call task function
	B = reverse_copy(A, N);

	// print result
	printf("Reversed array:");
	for (i = 0; i < N; i++)
		printf(" %d", B[i]);
	printf("\n");

	// free allocated memory
	free(A);
	free(B);

	return 0;
}	// main() 


/**
 * creates a reversed copy of array A (of size N)
 **/
int * reverse_copy(int *A, int N) {

	// TODO
	
	return NULL; // remove this

}