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  1. #include <stdio.h> 
  2.  
  3. int rec(int n){
  4.     if (n == 1){
  5.         return 1; 
  6.     }
  7.     else{
  8.         if (n % 2 == 1)  
  9.             return n + rec(n-2);
  10.         else             
  11.             return rec(n-1);
  12.     }
  13. }
  14.  
  15. int main(void) {
  16.     int n = 11;
  17.     printf("%d以下の正の奇数の和は%d\n", n, rec(n));
  18.     return 0;
  19. }
  20.  
Success #stdin #stdout 0s 5300KB
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Standard input is empty
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11以下の正の奇数の和は36
https://ideone.com/nEWsAd
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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