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  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. %%
  6.  
  7. [0-9]+                  { printf("NUMBER: %s\n", yytext); }
  8. [a-zA-Z_][a-zA-Z0-9_]*  { printf("IDENTIFIER: %s\n", yytext); }
  9. [+\-*/=]                { printf("OPERATOR: %s\n", yytext); }
  10. [ \t\n]                 { /* Skip whitespace */ }
  11.  
  12. .                       { printf("UNKNOWN: %s\n", yytext); }
  13.  
  14. %%
  15.  
  16. int main() {
  17.     yylex();
  18.     return 0;
  19. }
  20.  
Success #stdin #stdout #stderr 0.02s 6952KB
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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/CP6PPJ/prog:2:1: Syntax error: Operator expected
ERROR: /home/CP6PPJ/prog:19:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/siqXtC
language:
Prolog (swi 7.6.4)
created:
7 days ago
visibility:
public

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