Exercise 1-12

Exercise 1-12  Write a program that prints its input one word per line.

#include <stdio.h>

#define IN 1

#define OUT 0

int main(void)

{

  int c;

  int state;

  state = OUT;

  while (c=getchar(), c!=EOF)

  {

    switch(c)

    {

    case ' ':

    case '\t':

    case '\n':

      if (state == IN)

      {

        state = OUT;

        putchar('\n');

      }

      break;

    default:

      state = IN;

      putchar(c);

    }

  }

  if (state==IN)

    putchar ('\n');

  return 0;

}