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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. "-"         { printf("OPERATOR: %s\n", yytext); }
  11. "*"         { printf("OPERATOR: %s\n", yytext); }
  12. "/"         { printf("OPERATOR: %s\n", yytext); }
  13. "="         { printf("OPERATOR: %s\n", yytext); }
  14. ";"         { printf("SPECIAL SYMBOL: %s\n", yytext); }
  15. [ \t\n]     ;  
  16.  
  17. %%
  18. int main() {
  19.     yylex();
  20.     return 0;
  21.  
Success #stdin #stdout #stderr 0.02s 6916KB
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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/ggZxIU/prog:20:13: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/qMyS7N
language:
Prolog (swi 7.6.4)
created:
7 days ago
visibility:
public

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