ex_1-9.c

   1 #include <stdio.h>
   2
   3 main()
   4 {
   5         char first, second;
   6
   7         second = EOF;
   8
   9         while (( first = getchar()) != EOF)
  10         {
  11                 // putchar(first);
  12
  13                 if(first == ' ')
  14                         if(second != ' ')
  15                                 putchar('\n');
  16
  17                 if(second != ' ')
  18                         putchar(first);
  19
  20                 second = first; /* move old char to new char */
  21
  22         }
  23 }