/*
 *
 * Chapter 7
 * By John Stile
 * Purpose: 
 *  Write a program that asks an integer between 10 and 20 from the user.
 *  If the user enteres other values which do not satisfy the condition,
 *  prints an error message and asks for another number until the
 *  condition is met.  Use a do...while loop and if...else structure.
 */
#include <stdio.h>
#include <ctype.h>

int main(void)
{
  int  number; 
  do 
  {
    printf("Enter a number between 10 and 20: ");
    scanf("%d", &number); // read in one character
    getchar();       // clear input buffer
    printf("Testing %d\n", number);

    if ( ( number < 10) | (number > 20 ) )// not greater than 10
                                          // or 
                                          // not less than 20
    {
      printf("\nbad input! %d\n",number); // scold bad input
    }
  }
  while ( ( number < 10) | (number > 20 ) ) ; 

  printf("You entered %d\n", number);

  return 0;
}