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  1. #include <stdio.h>
  2.  
  3. int a(int n)
  4. {
  5.     if (n == 1)
  6.         return 1;
  7.     else
  8.         return 2 * a(n - 1) + 2;
  9. }
  10.  
  11. int main()
  12. {
  13.     printf("答えは:%d\n", a(4));
  14.     return 0;
  15. }
Success #stdin #stdout 0s 5324KB
comments (?)
stdin 
Standard input is empty
stdout 
答えは:22
https://ideone.com/QPRE0h
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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