/*
 * Program to demonstrate using array and "for".
 */
#include <stdio.h>

#define ASIZE 10

int main(void) {

	/*
	 * declare array and also some variables (a, b) before and after, to
	 * experiment with out-of-bounds access
	 */
	int a = -1;
	int nums[ASIZE];
	int b = -1;
	for (int i = 0; i < ASIZE; ++i) {
		nums[i] = i+1;
	}
	for (int i = 0; i < ASIZE; ++i) {
		printf("nums[%d] is %d\n", i, nums[i]);
	}

	printf("enter index\n");
	int index;
	if (scanf("%d", &index) != 1) {
		printf("invalid\n");
		return 1; /* bail out */
	}
	if ((index < 0) || (index >= ASIZE)) {
		printf("out of bounds -- good luck\n");
	}
	nums[index] = 100;
	for (int i = 0; i < ASIZE; ++i) {
		printf("nums[%d] is %d\n", i, nums[i]);
	}
	printf("did a and b (before and after nums) change? now %d, %d\n", 
			a, b);

	return 0;
}