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

/* function to print array */
void print_array(int sz, int a[]) {
	for (int i = 0; i < sz; ++i) {
		printf("elem %d is %d\n", i, a[i]);
	}
}

#define ASIZE 6

/* main program */
int main(void) {

        /* declare/create array */
	int num[ASIZE];
        /* initialize array */
	for (int i = 0; i < ASIZE; ++i) {
		num[i] = i+1;
	}
	print_array(ASIZE, num);

	printf("enter index\n");
	int n;
	if (scanf("%d", &n) != 1) { printf("error\n"); return 1; }
	/* should check for n < 0 or >= ASIZE here!! */
	num[n] = 100;
	print_array(ASIZE, num);
	return 0;
}