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  1. %{
  2. void display(int, char *);
  3. int flag;
  4. %}
  5.  
  6.  
  7. %%
  8. [a|e|i|o|u]+ {
  9. 	flag = 1;
  10. 	display(flag, yytext);
  11. 	}
  12. .       {
  13. 		flag = 0;
  14. 		display(flag, yytext);
  15. }
  16.  
  17.  
  18. %%
  19.  
  20.  
  21. void main()
  22. {
  23. 	printf("\nEnter a character to check whether it is vowel or NOT\n");
  24. 	yylex();
  25. }
  26.  
  27.  
  28. void display(int flag, char *t)
  29. {
  30. 	if(flag==1)
  31. 		printf("\nThe given character %s is a vowel\n", t);
  32. 	else
  33. 		printf("\nThe given character %s not is a vowel\n", t);
  34. }
  35.  
Success #stdin #stdout #stderr 0.03s 6944KB
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stdin
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a
stdout
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Standard output is empty
stderr
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ERROR: /home/1oebPI/prog:2:5: Syntax error: Operator expected
ERROR: /home/1oebPI/prog:34:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/jC8cGy
language:
Prolog (swi 7.6.4)
created:
247 days ago
visibility:
public

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