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  1. %{
  2. #include <stdio.h>
  3.  
  4. int positiveCount = 0;
  5. int negativeCount = 0;
  6. %}
  7.  
  8. %%
  9.  
  10. [1-9][0-9]*|0 { positiveCount++; }
  11. -[1-9][0-9]* { negativeCount++; }
  12. \n|. ; /* Ignore other characters and newlines */
  13.  
  14. %%
  15.  
  16. int main() {
  17.     yylex();
  18.     printf("Positive numbers: %d\n", positiveCount);
  19.     printf("Negative numbers: %d\n", negativeCount);
  20.     return 0;
  21. }
  22.  
  23. int yywrap() {
  24.     return 1;
  25. }
Success #stdin #stdout #stderr 0.02s 6932KB
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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/WjntBi/prog:2:1: Syntax error: Operator expected
ERROR: /home/WjntBi/prog:25:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/a4tWH1
language:
Prolog (swi 7.6.4)
created:
1 day ago
visibility:
public

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