numbers.h

   1
   2 #ifndef NUMBERS_H
   3 #define NUMBERS_H
   4
   5 typedef struct
   6 {
   7   char id;
   8   int val;
   9 } assoc;
  10
  11 char LETTERS[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  12
  13 assoc letter_value (char id, char* ref)
  14 {
  15   char* letters = ref;
  16
  17   for (int i = 0; i < 26; i++)
  18     {
  19       if (letters[i] == id)
  20         return (assoc) {id, i + 1};
  21     }
  22 }
  23
  24 int string_value (char* string, char* ref)
  25 {
  26   int result = 0;
  27   int length = strlen(string);
  28
  29   for (int i = 0; i < length; i++)
  30     {
  31       assoc val = letter_value(string[i], ref);
  32       result += val.val;
  33     }
  34
  35   return result;
  36 }
  37
  38 int digital_sum (int num, int base)
  39 {
  40   int result = 0;
  41   while (num > 0)
  42     {
  43       result = result + (num % base);
  44       num = num / base;
  45     }
  46
  47   return result;
  48 }
  49
  50 int digital_root (int num, int base)
  51 {
  52   while (num > base)
  53     num = digital_sum(num, base);
  54
  55   return num;
  56 }
  57
  58 #endif