#include<stdio.h>
// Alternatively:  #include "/usr/include/stdio.h"
#include "functions.h"

int main(){
	int x = 12;
	printf("x = %d, so x^2 = %d\n", x, square(x));
	int X[] = {5, 6, 10, 12};
	square_all(X, 4);
	for(int* i = X; X+4 > i; i++)
		printf("%d ", *i);
	printf("\n");
	return 0;
}