#include<stdio.h>

int main(){
	int A[] = {5, 10, 15, 20, 400};


	int sum = 0;
	for(int i = 0; i < 5; i++)
		sum += A[i];
	printf("sum = %d\n", sum);

	sum = 0;
	for(int* i = A; i - A < 5; i++)
		sum += *i; 
	printf("sum = %d\n", sum);

	// square each thing in A
	for(int* i = A; i - A < 5; i++)
		*i = *i * *i;

	printf("New contents of A:  [");
	for(int* i = A; i - A < 5; i++)
		printf("%d, ", *i);
	printf("\b\b]\n");


}