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  1. #include <stdio.h>
  2.  
  3. int is_odd(unsigned n);
  4. int is_even(unsigned n);
  5.  
  6. int is_even(unsigned n)
  7. {
  8.     return n == 0 ? 1 : is_odd(n-1);
  9. }
  10.  
  11. int is_odd(unsigned n)
  12. {
  13.     return n == 0 ? 0 : (n == 1 ? 1 : is_even(n-1));
  14. }
  15.  
  16. int main(void)
  17. {
  18.     unsigned num;
  19.  
  20. 	num = 17;
  21.     printf("%u is %s\n", num, is_even(num) ? "even" : "odd");
  22.  
  23.     return 0;
  24. }
  25.  
Success #stdin #stdout 0s 5276KB
comments (?)
stdin
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Standard input is empty
stdout
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17 is odd
https://ideone.com/NF40eY
language:
C (gcc 8.3)
created:
2 days ago
visibility:
secret

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