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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 == 1){
  5. 	    if (n == 1){
  6. 	        return 1;
  7. 	    }
  8. 	    else{
  9. 	        return n+rec(n-2);
  10. 	    }
  11. 	}
  12. 	else{
  13. 		if(n == 0){
  14. 			return 0;
  15. 		}
  16. 		else{
  17. 			return n+rec(n-2);
  18. 		}
  19. 	}
  20. }
  21. int main(void) {
  22.     int n = 11;
  23.     printf("%d以下の正の奇数の和は%d\n", n, rec(n));
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 5320KB
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Standard input is empty
stdout 
11以下の正の奇数の和は36
https://ideone.com/Iq3mEQ
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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