/* freq.c - Don Yang (uguu.org)

   Generate frequency table.

   09/13/01
                                                                           */

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int main(int argc, char **argv)
{
   FILE *infile;
   int freq[256], i, j;

   if( argc > 1 )
   {
      if( (infile = fopen(argv[1], "rb")) == NULL )
         return printf("Can not open %s\n", argv[1]);
   }
   else
   {
      infile = stdin;
   }

   for(memset(freq, 0, 256 * sizeof(int));
       (i = fgetc(infile)) != EOF;
       freq[i]++);

   (void)fclose(infile);

   (void)puts("int Frequencies[256] =\n{");
   for(i = 0; i < 32; i++)
   {
      printf("   ");
      for(j = 0; j < 7; j++)
         printf("%6d,", freq[i * 8 + j]);
      printf(i == 31 ? "%6d\n};\n" : "%6d,\n", freq[i * 8 + 7]);
   }

   return 0;
}