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  1. %{
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4.  
  5. void decimal_to_hexadecimal(int decimal) {
  6.     char hex[100];
  7.     int index = 0;
  8.  
  9.     if (decimal == 0) {
  10.         printf("Hexadecimal: 0\n");
  11.         return;
  12.     }
  13.  
  14.     printf("Decimal: %d\n", decimal);
  15.  
  16.     // Perform the conversion by repeated division
  17.     while (decimal > 0) {
  18.         int remainder = decimal % 16;
  19.         if (remainder < 10) {
  20.             hex[index] = '0' + remainder;
  21.         } else {
  22.             hex[index] = 'A' + (remainder - 10);
  23.         }
  24.         printf("Step: Decimal = %d / 16, Remainder = %d, Quotient = %d\n", decimal, remainder, decimal / 16);
  25.         decimal = decimal / 16;
  26.         index++;
  27.     }
  28.  
  29.     // Hexadecimal digits are stored in reverse order
  30.     printf("Hexadecimal: ");
  31.     for (int i = index - 1; i >= 0; i--) {
  32.         printf("%c", hex[i]);
  33.     }
  34.     printf("\n");
  35. }
  36. %}
  37.  
  38. %%
  39.  
  40. [0-9]+ {
  41.     int decimal = atoi(yytext); 
  42.     decimal_to_hexadecimal(decimal);
  43. }
  44.  
  45. \n  ;
  46.  
  47. .    ; // Ignore all other characters
  48.  
  49. %%
  50.  
  51. int main() {
  52.     yylex();
  53.     return 0;
  54. }
  55.  
Success #stdin #stdout #stderr 0.02s 6952KB
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Standard input is empty
stdout
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Standard output is empty
stderr
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ERROR: /home/zMqcOO/prog:2:1: Syntax error: Operator expected
ERROR: /home/zMqcOO/prog:54:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/9vz4qx
language:
Prolog (swi 7.6.4)
created:
7 days ago
visibility:
public

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