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  1. %{
  2. #include <stdio.h>
  3. #include <string.h>
  4.  
  5. int keyword_count = 0;
  6. int identifier_count = 0;
  7.  
  8. // List of C keywords
  9. char *keywords[] = {
  10.     "int", "float", "if", "else", "while", "return", "for", "char", "void", NULL
  11. };
  12.  
  13. int is_keyword(const char *word) {
  14.     for (int i = 0; keywords[i] != NULL; i++) {
  15.         if (strcmp(word, keywords[i]) == 0)
  16.             return 1;
  17.     }
  18.     return 0;
  19. }
  20. %}
  21.  
  22. %%
  23.  
  24. [a-zA-Z_][a-zA-Z0-9_]* {
  25.     if (is_keyword(yytext)) {
  26.         printf("Keyword: %s\n", yytext);
  27.         keyword_count++;
  28.     } else {
  29.         printf("Identifier: %s\n", yytext);
  30.         identifier_count++;
  31.     }
  32. }
  33.  
  34. [ \t\n]+   ;   // Ignore whitespace
  35. .          ;   // Ignore other characters
  36.  
  37. %%
  38.  
  39. int main() {
  40.     printf("Enter code (press Ctrl+D to finish input):\n");
  41.     yylex();
  42.     printf("\nTotal Keywords: %d\n", keyword_count);
  43.     printf("Total Identifiers: %d\n", identifier_count);
  44.     return 0;
  45. }
  46.  
  47. int yywrap() {
  48.     return 1;
  49. }
  50.  
Success #stdin #stdout #stderr 0.03s 6936KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
stderr 
ERROR: /home/CTypbU/prog:2:1: Syntax error: Operator expected
ERROR: /home/CTypbU/prog:49:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/z5D1jR
language:
Prolog (swi 7.6.4)
created:
1 day ago
visibility:
public

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