countchar.c

   1 #include <stdio.h>
   2
   3 int main()
   4 {
   5         int c, i, nwhite, nother, ndigit[10];
   6
   7         nwhite = nother = 0;
   8         for(i = 0; i < 10; i++)
   9                 ndigit[i] = 0;
  10         while((c = getchar()) != EOF)
  11         {
  12                 switch(c)
  13                 {
  14                         case '0': case '1': case '2': case '3': case '4':
  15                         case '5': case '6': case '7': case '8': case '9':
  16                                 ndigit[c-'0']++;
  17                                 break;
  18                         case ' ': case '\n': case '\t':
  19                                 nwhite++;
  20                                 break;
  21                         default:
  22                                 nother++;
  23                                 break;
  24                 }
  25         }
  26         printf("digits =");
  27         for(i =0; i < 10; i++)
  28                 printf(" %d", ndigit[i]);
  29         printf(", white space = %d, other = %d\n", nwhite , nother);
  30         return 0;
  31 }