fork download
copy 
  1. %{
  2. #include<stdio.h>
  3. #include<string.h>
  4.  
  5. int value(char ch)
  6. {
  7.     switch(ch)
  8.     {
  9.         case 'I': return 1;
  10.         case 'V': return 5;
  11.         case 'X': return 10;
  12.         case 'L': return 50;
  13.         case 'C': return 100;
  14.         case 'D': return 500;
  15.         case 'M': return 1000;
  16.         default: return 0;
  17.     }
  18. }
  19.  
  20. int romanToDecimal(char roman[])
  21. {
  22.     int i, sum = 0;
  23.     int len = strlen(roman);
  24.  
  25.     for(i = 0; i < len; i++)
  26.     {
  27.         if(i < len - 1 && value(roman[i]) < value(roman[i + 1]))
  28.             sum -= value(roman[i]);
  29.         else
  30.             sum += value(roman[i]);
  31.     }
  32.  
  33.     return sum;
  34. }
  35. %}
  36.  
  37. %%
  38.  
  39. [IVXLCDM]+
  40. {
  41.     printf("Roman Numeral : %s\n", yytext);
  42.     printf("Decimal Value : %d\n", romanToDecimal(yytext));
  43. }
  44.  
  45. \n      ;
  46.  
  47. .       {
  48.             printf("Invalid Roman Numeral\n");
  49.         }
  50.  
  51. %%
  52.  
  53. int yywrap()
  54. {
  55.     return 1;
  56. }
  57.  
  58. int main()
  59. {
  60.     printf("Enter Roman Numeral: ");
  61.     yylex();
  62.     return 0;
  63. }
  64.  
Success #stdin #stdout #stderr 0.03s 6844KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
stderr
copy 
ERROR: /home/WYIBIm/prog:2:1: Syntax error: Operator expected
ERROR: /home/WYIBIm/prog:63:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/uR7Xf9
language:
Prolog (swi 7.6.4)
created:
4 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!