digit_count.c

   1 #include <stdio.h>
   2
   3 main()
   4 {
   5         int c, i, nwhite, nother;
   6         int ndigit[10];
   7
   8         nwhite = nother = 0;
   9         for(i = 0; i < 10; i++)
  10                 ndigit[i] = 0;
  11
  12         while ((c = getchar()) != EOF)
  13                 if(c >= '0' && c <= '9')
  14                         ++ndigit[c-'0'];
  15                 else if (c == ' ' || c == '\n' || c == '\t')
  16                         ++nwhite;
  17                 else
  18                         ++nother;
  19
  20         printf("digits =");
  21         for(i = 0; i < 10; ++i)
  22                 printf(" %d", ndigit[i]);
  23         printf(", whitespace = %d, other = %d\n", nwhite, nother);
  24 }