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  1. %{
  2. #include <stdio.h>
  3.  
  4. int pos_num = 0;
  5. int neg_num = 0;
  6. %}
  7.  
  8. %%
  9.  
  10. [0-9]+      { pos_num++; }
  11. [-][0-9]+   { neg_num++; }
  12.  
  13. %%
  14.  
  15. int yywrap() {
  16.     return 1;
  17. }
  18.  
  19. int main() {
  20.     char input[1000];
  21.     printf("Enter numbers separated by spaces :");
  22.  
  23.  
  24.     fgets(input, sizeof(input), stdin);
  25.  
  26.     YY_BUFFER_STATE buffer = yy_scan_string(input);
  27.     yylex();
  28.  
  29.     printf("Number of positive numbers: %d\n", pos_num);
Success #stdin #stdout #stderr 0.03s 6840KB
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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/aCuF6i/prog:29:55: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/r5wZut
language:
Prolog (swi 7.6.4)
created:
7 days ago
visibility:
public

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