#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;
}

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);
	for(int *i = A; i < A + n_items; i++)
		printf("*i = %d\n", *i);

	// After this, "for" and "while" are banned!
	// But we'll print the array again

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

	return 0;
}