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  1. #include <stdio.h>
  2.  
  3. int factorial(int n)
  4. {
  5.   int fallback = 1;
  6.  
  7.   /* This breaks if you remove the comment,
  8.    * so leave it in.
  9.    */
  10.   if (n == 0) {         /* Handle 0! specially.
  11.     n = 1;               * 0! is the same as 1!.
  12.     return factorial(n); */    
  13.   } else {
  14.     return n * factorial(n - 1);
  15.   }
  16.  
  17.   return fallback;
  18. }
  19.  
  20. int main(void) {
  21. 	printf("%d\n", factorial(0));
  22. }
  23.  
Success #stdin #stdout 0s 4340KB
comments (?)
stdin 
Standard input is empty
stdout 
1
https://ideone.com/v98wcb
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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