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  1. #include <stdio.h>
  2.  
  3. int rec(int n){
  4.     if (n<=0){
  5.         return 0;
  6.     }
  7.     if (n%2 == 0){
  8.         n = n - 1;
  9.     }      
  10.     if (n == 1){
  11.         return 1;
  12.     }
  13.     else{
  14.         return rec(n - 2) + n;
  15.     }
  16. }
  17.  
  18. int main(void) {
  19.     int n = 10;
  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 0.01s 5328KB
comments (?)
stdin 
Standard input is empty
stdout 
10以下の正の奇数の和は25
https://ideone.com/z3uqmR
language:
C (gcc 8.3)
created:
12 days ago
visibility:
public

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