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  1. #include <stdio.h>
  2. //正の奇数nを引数とし，以下の正の奇数の和を求める関数
  3. int rec(int n){
  4.     if (n == 1){
  5.         return 1; 
  6.     }
  7.     else if(0==n/2){
  8.         return n=n-1;
  9.     }
  10.     else if(0!=n/2){
  11.     	return n+rec(n-2);
  12.  
  13.     }
  14. }
  15. int main(void) {
  16.     int n = 12;
  17.     printf("%d以下の正の奇数の和は%d\n", n, rec(n));
  18. 	return 0;
  19. }
Success #stdin #stdout 0s 5276KB
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12以下の正の奇数の和は41
https://ideone.com/dZy5Li
language:
C (gcc 8.3)
created:
18 hours ago
visibility:
public

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