Array in Class

/* Sum of array elements with class */
#include<iostream>
using namespace std;

class arrayElementSum {

	/* Declearation of array */
	int array[5];
	public:
		int sum;
	
		arrayElementSum(void) {
			cout << "Enter data for array:" << endl;

			/* '(sizeof(array)/sizeof(*array))' use to get length of the array */
			for(int i=0; i < (sizeof(array)/sizeof(*array)); i++)
				cin >> array[i];
				
		}

		void calculation() {
			for(int i=0; i< (sizeof(array)/sizeof(*array)); i++)
				sum += array[i];
		}
};

int main() {
	arrayElementSum arrayEsum = arrayElementSum();
	arrayEsum.calculation();
	
	/* Access public member variable 'sum' */
	cout << "Sum of array elements: " << arrayEsum.sum << endl;
	return 0;
}


/* Output */
Enter data for array:
1
2
3
4
5

Sum of array elements: 15