oneword.c

   1 #include <stdio.h>
   2 /* exercise 1-12: print the first word on each line */
   3 /* general idea:
   4         accept input line
   5         print up to first word, once a space is read stop for that line
   6         begin reading again on next line
   7         stop once EOF is read
   8         possibly putchar after all input is read
   9 */
  10 main() {
  11         int c;
  12         int oword = 0;
  13
  14         while((c = getchar()) != EOF) {
  15
  16 /*              if(c == ' ' && oword == 0) { */
  17                 if(c == ' ') {
  18                         oword = 1;
  19
  20                 } else {
  21                         if(oword == 0) {
  22                                 putchar(c);
  23                         } else if(c == '\n') {
  24                                 oword = 0;
  25                                 putchar('\n');
  26                         }
  27
  28                 }
  29
  30         }
  31         putchar('\n');
  32 }