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  1. %{
  2.   #include <stdio.h>
  3.   int lower = 0, upper = 0, mixed = 0;
  4. %}
  5.  
  6. %%
  7. [a-z]+              { lower++; }
  8. [A-Z]+              { upper++; }
  9. .+ {mixed++;}
  10.  
  11. int main() {
  12.   yylex();
  13.   printf("Lower = %d, Upper = %d, Mixed = %d\n", lower, upper, mixed);
  14.   return 0;
  15. }
  16.  
  17. int yywrap() {
  18.   return 1;
  19. }
  20.  
Success #stdin #stdout #stderr 0.04s 6936KB
comments (?)
stdin 
hello my NAME is Kshitj
stdout 
Standard output is empty
stderr 
ERROR: /home/zw64n6/prog:19:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/gHD1wY
language:
Prolog (swi 7.6.4)
created:
7 days ago
visibility:
public

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