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  1. double symbol() {
  2.     if (nextToken() == '(') {
  3.         expression();
  4.         if (nextToken() != ')'
  5.             throw error;
  6.     } else {
  7.         return getNumber();
  8.     }        
  9. }
  10.  
  11. double dice() {
  12.     double n = symbol();
  13.     do {
  14.         if (nextToken() == 'd') {
  15.             return rolldice(n, dice());
  16.         else 
  17.             break;
  18.     }while(1);
  19.     return n;
  20. }
  21.  
  22. double factor() {
  23.     double n = dice();
  24.     do {
  25.         if (nextToken() == '*') {
  26.             n*=factor();
  27.         else if (nextToken() == '/') {
  28.             double r = factor();
  29.             if (r==0)
  30.                 throw div0;
  31.             n/=r;
  32.         else if (nextToken() == '%') {
  33.             double r = factor();
  34.             if (r==0)
  35.                 throw div0;
  36.             n%=r;
  37.         } else
  38.             return break;
  39.      }while(1);
  40.      return n;
  41. }
  42.  
  43. double term() {
  44.     double n = factor();
  45.     do {
  46.         if (nextToken() == '+') {
  47.              n+=term();
  48.          else if (nextToken() == '-') {
  49.              n-=term();
  50.          else
  51.              break;
  52.     } while(1);
  53.     return n;
  54. }
  55.  
  56. double parse() {
  57.     return term();
  58. }
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https://ideone.com/v9SBx
language:
C++ (gcc 8.3)
created:
14 years ago
visibility:
public

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