/*
 * Another simple example of recursion:
 * program to count down from n to 0 (print numbers from n to 0)
 */
#include <stdio.h>

void countdown(int n);

int main(void) {
	int n;
	printf("enter starting value\n");
	if (scanf("%d", &n) == 1) {
		printf("\n"); /* blank line */
		countdown(n);
		return 0;
	}
	else {
		printf("not an integer value\n");
		return 1;
	}
}

/* print values from n down to 0 */
void countdown(int n) {
	if (n < 0) {
		printf("Done\n");
	}
	else {
		/* reverse the order of these two statements to count up */
		printf("%d\n", n);
		countdown(n-1);
	}
}