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  1. %{
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4. %}
  5.  
  6. %%
  7. [a-zA-Z_][a-zA-Z0-9_]*    { printf("IDENTIFIER: %s\n", yytext); }
  8. [0-9]+                    { printf("NUMBER: %s\n", yytext); }
  9. [+\-*/=]                  { printf("OPERATOR: %s\n", yytext); }
  10. [ \t\n]+                  ;  /* Ignore whitespace */
  11. .                         { printf("UNKNOWN: %s\n", yytext); }
  12. %%
  13.  
  14. int main() {
  15.     yylex();
  16.     return 0;
  17. }
  18.  
Success #stdin #stdout #stderr 0.04s 6928KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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ERROR: /home/AdSF3b/prog:2:1: Syntax error: Operator expected
ERROR: /home/AdSF3b/prog:17:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/cryF3G
language:
Prolog (swi 7.6.4)
created:
297 days ago
visibility:
public

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