fork download
copy 
  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.     else if(n==1){
  8.     	return 1;
  9.     }
  10.     else{
  11.         return n+rec(n-2);
  12. 	}
  13. }
  14.  
  15.  
  16. int main(void) {
  17.     int n = 17;
  18.     if(n%2!=0){
  19.     printf("%d以下の正の奇数の和は%d\n", n, rec(n));
  20.     }
  21.     else {
  22.     printf("%d以下の正の偶数の和は%d\n", n, rec(n));	
  23.     }
  24. 	return 0;
  25. }
Success #stdin #stdout 0.01s 5276KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
17以下の正の奇数の和は81
https://ideone.com/yQU17t
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!