cutblanks.c

   1 #include <stdio.h>
   2 /* exercise 1-9: truncate a string of blanks to 1 blank */
   3
   4 main() {
   5         int c;
   6         int blank = 0;
   7         while((c = getchar()) != EOF) {
   8                 if(c == ' ') {
   9                         blank = 1;
  10                 } else {
  11                         if(blank == 1) {
  12                                 putchar(' ');
  13                                 blank = 0;
  14                         }
  15                         putchar(c);
  16                 }
  17         }
  18         putchar('\n');
  19 }