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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%2==0){
  5.      if(n==2){
  6.        return 2;
  7.       } else{
  8.    			return n+rec(n-2);
  9.      	}
  10. } else{
  11. if(n==1){
  12. 	return 1;
  13. 	}else{
  14. 		return n+rec(n-2);
  15. 	}
  16. }
  17. }
  18. int main(void) {
  19.     int n = 11;
  20.     printf("%d以下の正の奇数の和は%d\n", n, rec(n));
  21. 	return 0;
  22. }
Success #stdin #stdout 0s 5288KB
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11以下の正の奇数の和は36
https://ideone.com/MfAXNN
language:
C (gcc 8.3)
created:
17 hours ago
visibility:
public

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