solutions/The C Programming Language/1.11.c

#include <stdio.h>

#define IN 1
#define OUT 0

// counting words from getstream,
// doesn't work with backspace
// (by design)

main()
{
	int c, nl, nw, nc, state;
	nl = nw = nc = 0;
	while ((c = getchar()) != EOF)
	{
		++nc;
		// We do not handle \b, so words count get messed up if we erase anything
		if (c == '\n')
			++nl;
		if (c == ' ' || c == '\n' || c == '\t')
			state = OUT;
		else if (state == OUT)
		{
			state = IN;
			++nw;
		}
	}
	printf("%d %d %d\n", nl, nw, nc);
}