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  1. #include <stdio.h>
  2. //再帰を用いて1からnまでの二乗和1^2 + 2^2 + 3^2 + ... + n^2を計算する
  3. int rec(int n){
  4.     int a=0;
  5.     for(int i=1;i<=n;i++){
  6.     	a=a+i*i;
  7.     }return a;
  8. }
  9. int main(void) {
  10.     int n = 4;
  11.     printf("1から%dまでの二乗和の値は%d\n", n, rec(n));
  12. 	return 0;
  13. }
  14.  
  15.  
Success #stdin #stdout 0s 5316KB
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1から4までの二乗和の値は30
https://ideone.com/8COLNB
language:
C (gcc 8.3)
created:
12 days ago
visibility:
public

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