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  1. #include <stdio.h>
  2.  
  3. //再帰を用いて1からnまでの二乗和を計算する
  4. int rec(int n) {
  5.     if (n == 1) {
  6.         return 1;
  7.     }
  8.     else {
  9.         return  n*n+rec(n-1);
  10.     }
  11. }
  12.  
  13. int main(void) {
  14.     int n;
  15.  
  16.     for (n = 1; n <= 4; n++) {
  17.         printf("1から%dまでの二乗和の値は%d\n", n, rec(n));
  18.     }
  19.  
  20.     return 0;
  21. }
Success #stdin #stdout 0s 5296KB
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stdin
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Standard input is empty
stdout
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1から1までの二乗和の値は1
1から2までの二乗和の値は5
1から3までの二乗和の値は14
1から4までの二乗和の値は30
https://ideone.com/3EfTu2
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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