solutions/The C Programming Language/1.12.c

#include <stdio.h>

#define IN 1
#define OUT 0

// converting input string to one word per line

main()
{
	int c, state, word_ending;
	state = 0;
	while ((c = getchar()) != EOF)
	{
		word_ending = (c == ' ' || c == '\n' || c == '\t');
		if (state == IN)
		{
			if (word_ending)
			{
				state = OUT;
				putchar('\n');
			}
			else
			{
				putchar(c);
			}
		}
		else
		{
			if (!word_ending)
			{
				state = IN;
				putchar(c);
			}
		}
	}
}