#include<stdio.h>

void square_all(int *A, size_t n_items){
	printf("Sizeof A:  %d\n", sizeof(A));
	for(int *i = A; i < A + n_items; i++)
		*i = *i * *i;
}

#define array_printf(array, items, type, flag)     \
	for(type *i = array; i < array + items; i++)    \
		printf("*i = "flag"\n", *i);

int main(){
	int A[] = {3, 5, 7, 9, 11, 13, 15, 17, 19, 21};
	size_t n_items = sizeof(A) / sizeof(int);
	printf("n_items = %lu\n", n_items);
	square_all(A, 10);
	printf("n_items = %lu\n", n_items);

	array_printf(A, n_items, int, "%d");
	// After this, "for" and "while" are banned!
	// But we'll print the array again

	float B[] = {1.5, 2.6, 3.8};
	array_printf(B, 3, float, "%f");

	int *i = A;
loop_top:
	printf("(goto version) *i = %d\n", *i);
	i++;
	if(i < A + n_items)
		goto loop_top;

	return 0;
}