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

bool alphabetic (const char c)
{
	if((c >= 'a' && c<= 'z') || (c>= 'A' && c <= 'Z') ||(c >= '0' && c<='9') || c == '\t' || c =='\n' || c == ' ' ||c == '-')
		return true;
	else
		return false;
}
void readline (char buffer[])
{
	char character; 
	int i=0;
	
	do{
		character = getchar();
		buffer[i] = character;
		++i;
	} while (character !='\n');
	
		buffer[i-1] = '\0';
	
}

int countwords (const char string[])

{
	int i, lettercount = 0;
	bool looking_for_word = true, alphabetic (const char c);
	
	for (i=0; string[i] != '\0'; ++i)
		if(alphabetic(string[i]))
		{
			if(looking_for_word) {
			++lettercount;
			looking_for_word=true;
			
			}
		}
	else
		looking_for_word = true;
	return lettercount;
}
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("\n There are %i letters in the above text. \n",totalwords);
	
	return 0;
}