/* File: input2.c

   Pester user to enter a positive number.
   Different style of while loop.
*/

#include <stdio.h>

int main() {
   int n ;

   while (1) {  // 1 means "true"

      printf("Please enter a positive number: ") ;
      scanf("%d", &n) ;

      // Note: other people, sanctimonious types,
      // say you should never use 'break'.
      // I say, here's a good example.

      if (n >0) break ;  // exits while loop

      printf("%d is not a positive number!\n", n) ;
   }

   printf("Thank you! I like the number %d.\n", n) ;

   return 0 ;
}