#include <stdio.h>

/* count digits, white space, others */
main()
{
   int c, i, nwhite, nother;
   int ndigit[10];

   nwhite = nother = 0;
   for (i = 0; i < 10; ++i)
       ndigit[i] = 0;

   while ((c = getchar()) != EOF)
       if (c >= '0' && c <= '9')
           ++ndigit[c-'0'];
       else if (c == ' ' || c == '\n' || c == '\t')
           ++nwhite;
       else
           ++nother;

   printf("digits =");
   for (i = 0; i < 10; ++i)
       printf(" %d", ndigit[i]);
   printf(", white space = %d, other = %d\n",
       nwhite, nother);
}


/*
Discuss:

- arrays, subscripts
- else if
- testing for digits


*/