/**
 * digits - Count the number of digit characters, whitespace characters, and
 *   other characters from standard input.
 *
 * Based on a program found on p. 22 of the 2nd edition of K&R.
 * Updated a bit by Samuel A. Rebelsky.
 * Annotated by the members of CSC 161 2011S.
 */

// +---------+--------------------------------------------------------
// | Headers |
// +---------+

#include <stdio.h>      // Access the stuff in the stdio library, such
			// as printf


// +------+-----------------------------------------------------------
// | Main |
// +------+

// Main is where we start all programs.

int
main ()
{
  // Declare a bunch of integer variables
  int c;                // The current character read from stdin.
  int i;                // Counter variable for loops
  int nwhite;           // The number of whitespace characters
  int nother;           // The number of "other" characters
  int ndigit[10];       // The number of digit characters.
                        //   ndigit[0] gives the number of '0's, etc.

  // Initialize everything to 0: Our starting point.  We haven't seen
  // any characters.
  nwhite = 0;
  nother = 0;
  for (i = 0; i < 10; i++)
    ndigit[i] = 0;

  // Repeatedly
  //   Read a character
  //   Assign it to c
  //   Stop when you reach end of file
  while ((c = getchar ()) != EOF)
    {
      // If the current character is a digit
      if ((c >= '0') && (c <= '9'))
        // Increment the counter associated with that digit
        ++ndigit[c-'0'];
      // If the current character is a blank or a newline or a tab
      else if ((c == ' ') || (c == '\n') || (c == '\t'))
        ++nwhite;
      // Otherwise, it's something else
      else
        ++nother;
    } // while

  ndigit[9] = 23412;
  // Display our counts
  printf ("digits =");
  // printf ("%d %d %d %d %d %d %d %d ...", ndigits[0], ndigits[1], ...)
  for (i = 0; i < 10; i++)
    printf(" %02d", ndigit[i]);
  printf(", whitespace = %d, other = %d\n",
         nwhite, nother);

  return 0;
} // main