ex.11.9.c

#include <stdio.h>
#include <stdbool.h>

bool alphabetic (const char c)
{
	if ( (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') )
		return true;
	else
		return false;
}

void readLine (char *buffer)
{
	char	character;

	do
	{
		character = getchar ();
		*buffer++ = character;
	}
	while ( character != '\n' );

	*(--buffer) = '\0';
}

int countWords (const char string[])
{
	int		i, wordCount = 0;
	bool	lookingForWord = true, alphabetic (const char c);

	for ( i = 0; string[i] != '\0'; ++i )
		if ( alphabetic(string[i]) )
		{
			if ( lookingForWord )
			{
				++wordCount;
				lookingForWord = false;
			}
		}
		else
			lookingForWord = true;

	return wordCount;
}

int main (void)
{
	char	text[81];
	int		totalWords = 0;
	int		countWords (const char string[]);
	void	readLine (char *buffer);
	bool	endOfText = false;

	printf ("Type in your text.\n");
	printf ("When you are done, press 'RETURN'.\n\n");

	while ( ! endOfText )
	{
		readLine (text);

		if ( text[0] == '\0' )
			endOfText = true;
		else
			totalWords += countWords (text);
	}

	printf ("\nThere are %i words in the above text.\n", totalWords);

	return 0;
}