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

#define N_ELEMENTS(arr) (sizeof(arr) / sizeof(arr[0]))
#define ADD5(x) (x + 5)

#define N_ELEMENTS_SAFE(arr) \
	((sizeof(arr) == sizeof(void*) && \
	(size_t)arr - (size_t)&main < 0x7fffffff0000 )? \
	0 == printf("Error\n") : (sizeof(arr) / sizeof(arr[0])))

#define FOREACH(arr, fun) \
	for(int i = 0; i < N_ELEMENTS_SAFE(arr); i++) \
		fun(arr[i])

int main(){
	int A[] = {9, 7, 5, 3, 1};

	for(int i = 0; i < N_ELEMENTS_SAFE(A); i++){
		printf("%d\n", A[i]);
	}

	printf("(15 + 5) / 10 = %d\n", ADD5(15) / 10);

	int *hA = malloc(5 * sizeof(int));
	memcpy(hA, A, sizeof(A));
	hA[2] = 400;

	for(int i = 0; i < N_ELEMENTS_SAFE(hA); i++){
		printf("%d\n", hA[i]);
	}
	
	void a_fun(int p){
		while(p--)
			printf("*");
		printf("\n");
	}

	FOREACH(A, a_fun);

	return 0;
}