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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 n;
  6.     }
  7.     else{
  8.         return n + rec(n - 2);
  9.     }
  10. }
  11. int main(void) {
  12.     int n = 11;
  13.     if(n%2==0)
  14.     	printf("%d以下の正の偶数の和は%d\n", n, rec(n));
  15.  
  16.     if(n%2==1)
  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 5320KB
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11以下の正の奇数の和は36
https://ideone.com/uLRY6T
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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