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  1. /*lex program to count number of words*/
  2. %{ 
  3. #include<stdio.h>
  4. #include<string.h>
  5. int i = 0; 
  6. %} 
  7. /* Rules Section*/
  8. %% 
  9. ([a-zA-Z0-9])*    {i++;} /* Rule for counting  
  10.                           number of words*/
  11. "\n" {printf("%d\n", i); i = 0;} 
  12. %% 
  13. int yywrap(void){} 
  14. int main() 
  15. {    
  16.     // The function that starts the analysis 
  17.     yylex(); 
  18.     return 0; 
  19. }
Success #stdin #stdout #stderr 0.03s 6852KB
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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/GIHTuv/prog:19:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/10DOEQ
language:
Prolog (swi 7.6.4)
created:
11 hours ago
visibility:
public

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