/*
Programmer:	Greg Perkins
Program:		ltr_count1.c
Class:		CS 73 C/UNIX
Due:			17 February 1998

This program does the exact same thing that letter_count.c did.  The
only difference is that the program has been separated into two files
for a multi-file compiler exercise.
*/

#include <stdio.h>
#include <ctype.h>

int main()
{
	int count = 0;
	int new_char, prev_char = -999;	/* -999 indicates first character */

	while ((new_char = getchar()) != EOF)
	{
		/* consider upper & lowercase letters as equal */
		if (isalpha(new_char))
			new_char = tolower(new_char);

		if (prev_char != -999)		/* if past first character */
		{
			/* if new_char is not whitespace or punctuation check repeat */
			if(isalnum(new_char))
				if (are_equal(new_char, prev_char))
					count++;
				else
					prev_char = new_char;
		}
		else
			prev_char = new_char;
 	}

	printf("\nThe number of repeated characters was %d.\n", count);

	return (0);
}