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  1. %{
  2. #include<stdio.h>
  3. int word_count = 0;
  4. %}
  5.  
  6. %%
  7. [a-zA-Z]+ { word_count++; }
  8. .         { /* Ignore everything else */ }
  9.  
  10. %%
  11. int main() {
  12.     yylex();
  13.     printf("Number of words: %d\n", word_count);
  14.     return 0;
  15. }
  16.  
Success #stdin #stdout #stderr 0.02s 6844KB
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stdin
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hello there
stdout
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Standard output is empty
stderr
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ERROR: /home/JSpPUp/prog:2:1: Syntax error: Operator expected
ERROR: /home/JSpPUp/prog:15:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/rackzx
language:
Prolog (swi 7.6.4)
created:
11 days ago
visibility:
public

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