#include <stdio.h>
// 再帰を用いて1からnまでの二乗和を計算する関数
int rec(int n){
if (n == 1){
return 1;
}
else{
return n * n + rec(n - 1);
}
}
int main(void) {
int n = 4;
printf("1から%dまでの二乗和の値は%d\n", n
, rec
(n
)); return 0;
}
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