/*
 * Program to count characters read from stdin.
 * Also counts how many are letters (as an example of doing something
 * with each character).
 */
#include <stdio.h>
#include <stdlib.h> /* has EXIT_SUCCESS, EXIT_FAILURE */
#include <ctype.h>

int main(int argc, char* argv[]) {
	int count = 0;
	int letter_count = 0;
	int ch; /* input character -- NOTE that it is int not char */

	printf("enter some text, multiple lines okay, control-D to end\n");
	/* slightly cryptic but C-idiomatic way to read to end of file */
	while ((ch = getchar()) != EOF) {
		++count;
		if (isalpha(ch)) ++letter_count;
	}
	printf("%d chars, %d letters\n", count, letter_count);
	return EXIT_SUCCESS;
}