Write a program in C++ to check whether a number is a Strong Number or not

#include <iostream>
using namespace std;

int main()
{
    int i, n, n1, s1 = 0, j;
    long fact;
    cout << "\n\n Check whether a number is Strong Number or not:\n";
    cout << "----------------------------------------------------\n";
    cout << " Input a number to check whether it is Strong number: ";
    cin >> n;
    n1 = n;
    for (j = n; j > 0; j = j / 10) {
        fact = 1;
        for (i = 1; i <= j % 10; i++) {
            fact = fact * i;
        }
        s1 = s1 + fact;
    }
    if (s1 == n1) {
        cout << n1 << " is Strong number." << endl;
    }
    else {
        cout << n1 << " is not a Strong number." << endl;
    }
}