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  1. %{
  2.   #include <stdio.h>
  3.   int i=0;
  4. %}
  5. digit [0-9];
  6. letter [a-z A-Z_];
  7. %%
  8. {letter}({letter}|{digit})* {i++;}
  9. {digit} ({letter}|{digit})* {i;}
  10. %%
  11. int yywrap(){
  12.   return 1;
  13. }
  14. int main(){
  15.   printf("Enter input ");
  16.   yylex();
  17.   printf("No of identifiers:%d",i);
  18.   return 0;
  19. }
Success #stdin #stdout #stderr 0.02s 6984KB
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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/2u525h/prog:19:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/xsBahK
language:
Prolog (swi 7.6.4)
created:
17 hours ago
visibility:
public

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