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  1. %{
  2.   #include<stdio.h>
  3.  
  4. %}
  5. %%
  6. [a-zA-Z_][a-zA-Z0-9_]*       {printf("%s is an identifier");}
  7. [+-]?[0-9]+                  {printf("%s is a signed number ");}
  8. [0-9]+                       {printf("Rejected");}
  9. %%
  10. int main(){
  11.   printf("enter:");
  12.   yylex();
  13.  
  14. }
  15. int yywrap(){
  16.   return 1;
  17. }
Success #stdin #stdout #stderr 0.02s 6936KB
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stdin
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-45
stdout
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Standard output is empty
stderr
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ERROR: /home/Qj5e2U/prog:17:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/i1rMqM
language:
Prolog (swi 7.6.4)
created:
15 hours ago
visibility:
public

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