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  1. %{
  2. #include <stdio.h>
  3. %}
  4.  
  5. %%
  6. if       {printf("%s is a keyword\n", yytext);}
  7. else     {printf("%s is a keyword\n", yytext);}
  8. printf   {printf("%s is a keyword\n", yytext);}
  9. [0-9]+   {printf("%s is a number\n", yytext);}
  10. [a-zA-Z]+ {printf("%s is a word\n", yytext);}
  11. .|\n     {ECHO;}
  12. %%
  13.  
  14. int main() {
  15.   printf("\nEnter the string: ");
  16.   yylex();
  17.   return 0;
  18. }
  19.  
  20. int yywrap() {
  21.   return 1;
  22. }
  23.  
Success #stdin #stdout #stderr 0.03s 6976KB
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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/TobE0O/prog:22:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/jEcfrG
language:
Prolog (swi 7.6.4)
created:
1 day ago
visibility:
public

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