/*
 * program to illustrate a problemj with using scanf
 * and how to fix it
 * set BAD to get the version with the problem
 * otherwise you get the fixes version
 *
 * Matt Bishop, ECS 36A
 * April 9, 2024	original version
 */
#include <stdio.h>

int main(void)
{
	int i;			/* variable to hold input */

	/* initialzize i -- needed as if the user enters */
	/* bad input, we want to come back and ask again */
	i = 1;

	/*
	 * loop until the user types a 0 or negative number
	 */
	do {
#ifdef BAD
		/* may cause an infinite loop */
		scanf("%d", &i);
#else
		/* if given input that (in BAD) causes an */
		/* infinite loop, give error and quit     */
		if (scanf("%d", &i) != 1){
			fprintf(stderr, "You blew it -- integers only\n");
			return(1);
		}
#endif
		/* print what the uer entered */
		printf("i = %d\n", i);

		/* and loop until they enter a non-positive number */

	} while(i > 0);

	/* th-th-that's all, folks! */
	return(0);
}