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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.  
  8. /* Rules Section*/
  9. %% 
  10. ([a-zA-Z0-9])* {i++;} /* Rule for counting 
  11. 						number of words*/
  12.  
  13. "\n" {printf("%d\n", i); i = 0;} 
  14. %% 
  15.  
  16. int yywrap(void){} 
  17.  
  18. int main() 
  19. { 
  20. 	// The function that starts the analysis 
  21. 	yylex(); 
  22.  
  23. 	return 0; 
  24. } 
  25.  
  26.  
Success #stdin #stdout #stderr 0.03s 6940KB
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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/KW4f03/prog:25:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/H6gtS0
language:
Prolog (swi 7.6.4)
created:
106 days ago
visibility:
public

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