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  1. %{
  2. int pos = 0, neg = 0;
  3. %}
  4. %%
  5. [+]?[0-9]+     { pos++; }
  6. -[0-9]+        { neg++; }
  7. .|\n           ; // Ignore other input
  8. %%
  9. int main() {
  10.     yylex();
  11.     printf("Positive: %d\nNegative: %d\n", pos, neg);
  12.     return 0;
  13. }
  14.  
Success #stdin #stdout #stderr 0.02s 6948KB
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Standard input is empty
stdout
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Standard output is empty
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ERROR: /home/Oly5JU/prog:13:1: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/N769ko
language:
Prolog (swi 7.6.4)
created:
4 days ago
visibility:
public

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