ex_1-14a.c

   1 #include <stdio.h>
   2 #include <limits.h>
   3
   4 main()
   5 {
   6        int c, i, j, nwhite, nother, maxnum;
   7         int ndigit[CHAR_MAX] = {0};
   8
   9         maxnum = 0;
  10         nwhite = nother = 0;
  11
  12         for(i = 0; i < 10; i++)
  13                 ndigit[i] = 0;
  14
  15         while ((c = getchar()) != EOF)
  16                 if(c > CHAR_MAX) { /* chars outside CHAR_MAX skipped */ } else { ++ndigit[c]; }
  17
  18         /* print out histogram */
  19         for(i = 0; i <= CHAR_MAX; ++i) // find maximim count to determine graph height
  20                 if(ndigit[i] > maxnum) { maxnum = ndigit[i]; }
  21
  22         for(i = 0; i < maxnum; ++i) // one row for each instance of number
  23         {
  24                 printf("\n");
  25                 printf("%d\t|", maxnum-i); // print sidebar
  26                 for(j = 0; j <= CHAR_MAX; ++j) // one column for each number
  27                 {
  28                         if(ndigit[j] > 0) // skip chars not represented in file
  29                                 if(ndigit[j] >= maxnum-i) { putchar('*'); } else { putchar(' '); }
  30                 }
  31         }
  32
  33         /* print vertically ascii value of char printed */
  34         printf("\n\t ");
  35         for (i = 0; i <= CHAR_MAX; ++i) { if(ndigit[i] > 0) { printf("%d", i/100); } }
  36         printf("\n\t ");
  37         for (i = 0; i <= CHAR_MAX; ++i) { if(ndigit[i] > 0) { printf("%d", (i-(100*(i/100)))/10); } }
  38         printf("\n\t ");
  39         for (i = 0; i <= CHAR_MAX; ++i) { if(ndigit[i] > 0) { printf("%d",  i-(10*(i/10))); } }
  40         printf("\n");
  41 }