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  1. %{
  2. #include<stdio.h>
  3. %}
  4.  
  5. %%
  6. "Return"|"if"|"else"|"and"|"or" {printf("Comments:",yytext());}
  7. ['+''-''/''*''%'] {printf("Operators:",yytext());}
  8. [a-zA-Z0-9]+ {printf("variables:",yytext());}
  9. %%
  10. int main(){
  11. yylex();
  12. printf("Enter an Expression:");
  13. return o;
  14. }
  15.  
Success #stdin #stdout #stderr 0.02s 6960KB
comments (?)
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/u5ANHm/prog:14:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/xU3cGl
language:
Prolog (swi 7.6.4)
created:
19 days ago
visibility:
public

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