ch1/09.c

   1 /*
   2  * Exercise 1-9:
   3  * Write a program to copy its input to its output, replacing each string of one or more blanks by a
   4  * single blank.
   5  */
   6
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9
  10 int
  11 main(void)
  12 {
  13         // Read all input until EOF.
  14         int c;
  15         while ((c = getchar()) != EOF) {
  16                 /*
  17                  * Upon reaching a space, print said space, and then keep looping
  18                  * until we get back to non-space characters.
  19                  */
  20                 if (c == ' ') {
  21                         putchar(c);
  22                         while ((c = getchar()) == ' ' && c != EOF)
  23                                 ;
  24                 }
  25
  26                 if (c == EOF)
  27                         break;
  28
  29                 putchar(c);
  30         }
  31
  32         return EXIT_SUCCESS;
  33 }