c_ch01_ex12.c

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

#include <stdio.h>
#define	IN   1  /* inside a word */
#define	OUT  0  /* outside a word */

/* count lines, words, and characters in input */

main() {
	int c, state;
	state = OUT;

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