itsa [C_AR03-易]計算陣列中所有元素的立方和

#include<iostream>
using namespace std;

int main()
{
long long sum = 0;
int arr[6];
for (int i = 0;i < 6; i++)
cin >> arr[i];
for (int j = 0;j < 6; j++)
sum += arr[j] * arr[j] * arr[j];
cout << sum << endl;
return 0;
}