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  1. #include <stdio.h>
  2.  
  3. int rec(int n)
  4. {
  5.     if (n == 1) {
  6.         return 1;
  7.     }
  8.     else {
  9.         return rec(n - 2) + n;
  10.     }
  11. }
  12.  
  13. int main(void)
  14. {
  15.     int n = 11;
  16.     printf("%d以下の正の奇数の和は%d\n", n, rec(n));
  17.  
  18.     return 0;
  19. }
Success #stdin #stdout 0s 5268KB
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11以下の正の奇数の和は36
https://ideone.com/bsW4ao
language:
C (gcc 8.3)
created:
18 hours ago
visibility:
public

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