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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==0){
  5. return 0;}
  6.  
  7.  
  8.     if (n == 1){
  9.         return 1;
  10.     }
  11.  
  12.     else{
  13.         return n+rec(n-2);
  14.     }
  15. }
  16. int main(void) {
  17.     int n = 6;
  18. if(n%2==0)
  19. {printf("%d以下の正の偶数の和は%d\n", n, rec(n));}
  20. else{
  21.     printf("%d以下の正の奇数の和は%d\n", n, rec(n));
  22. }
  23. 	return 0;
  24. }
Success #stdin #stdout 0s 5308KB
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6以下の正の偶数の和は12
https://ideone.com/bEOU10
language:
C (gcc 8.3)
created:
18 hours ago
visibility:
public

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