/****************************************************/
/*                                                  */
/*  program: "Death by scanf"                       */
/*  file-name: death_by_scanf.c                     */
/*                                                  */
/*  author: Jesse Bollinger                         */
/*  date of creation: 2009-01-30                    */
/*  date of latest revision: 2009-02-06             */
/*                                                  */
/*  description:                                    */
/*                                                  */
/*    This program provides an environment for      */
/*    demonstrating one of the common pitfalls      */
/*    of scanf, unexpected loop behavior.           */
/*                                                  */
/*    Type 0 at scanf prompt to quit the program.   */
/*                                                  */
/****************************************************/

#include <stdlib.h>
#include <stdio.h>

#define MAX_NUM_OF_LOOPS 12

int main()
{
	int scanf_read_count;	
	int input_value;
	
	int i;
	for( i = 0; i < MAX_NUM_OF_LOOPS; i++ )
	{
		printf( "\n------------------------------------------\n" );
		
		printf( "scanf wants a number\n" );
		printf( "write your input and press enter: " );
		
		scanf_read_count = scanf( "%d", &input_value );
		
		if( input_value == 0 )
		{
			break;
		}
		
		printf( "\nscanf has read %d value(s)\n", scanf_read_count );
		printf( "input_value is %d\n", input_value );
		
		printf( "------------------------------------------\n" );
	}
	
	/* exit notification */
	printf( "\n<press enter to quit>" );
	
	/* prevent console from instantly closing on program termination */
	/* by waiting for enter to be pressed */
	fflush( stdin );
	scanf( "%*c" );
	
	/* EXIT_SUCCESS return code tells the OS that program execution went ok */
	return EXIT_SUCCESS;
}