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  1. %{ 
  2. int n = 0 ; 
  3. %} 
  4.  
  5. // rule section 
  6. %% 
  7. //count number of keywords 
  8. "while" | "if" | "else" { n++; 
  9. printf("\t keywords : %s", yytext);} 
  10. // count number of keywords 
  11. "int" | "float" { n++; 
  12. printf("\t keywords : %s", yytext);} 
  13. // count number of identifiers 
  14. [a-zA-Z_] [a-zA-Z0-9_]* { n++; 
  15. printf("\t identifier : %s", yytext);} 
  16. // count number of operators 
  17. "<=" | "==" | "=" | "++" | "-" | "*" | "+" { n++; 
  18. printf("\t operator : %s", yytext);} 
  19. // count number of separators 
  20. [ () {} | , ; ] { n++; 
  21. printf("\t separator : %s", yytext);} 
  22. // count number of floats 
  23. [0-9]* "." [0-9]+ { n++; 
  24. printf("\t float : %s", yytext);} 
  25. // count number of integers 
  26. [0-9]+ {n++; 
  27. printf("\t integer : %s", yytext);} 
  28. . ; 
  29. %% 
  30. int main() 
  31. { 
  32. yylex(); 
  33. printf("\n total no. of token = %d\n", n); 
  34. } 
  35.  
Success #stdin #stdout #stderr 0.02s 6844KB
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Standard input is empty
stdout
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Standard output is empty
stderr
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ERROR: /home/44Si6c/prog:2:4: Syntax error: Operator expected
ERROR: /home/44Si6c/prog:34:2: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/UVYqTI
language:
Prolog (swi 7.6.4)
created:
11 days ago
visibility:
public

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