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  1. %{
  2.  int a;
  3. %}
  4.  
  5. %%
  6. [a-z|A-Z|_]  [a-z | A-Z |0-9|_]^*{a++;}
  7. %%
  8.  
  9. int yywrap(){
  10. return 1;
  11. }
  12.  
  13. int main()
  14. {
  15. yylex();
  16. printf("Total valid identifiers found :%d\n",a);
  17. return 0;
  18. }
  19.  
  20.  
  21.  
Success #stdin #stdout #stderr 0.02s 6900KB
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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/Y6Q40a/prog:20:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/Eu95GH
language:
Prolog (swi 7.6.4)
created:
11 days ago
visibility:
public

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