TheAlgorithms-C-Plus-Plus/dynamic_programming/armstrong_number.cpp

// Program to check whether a number is an armstrong number or not
#include <iostream>

using std::cin;
using std::cout;

int main() {
    int n, k, d, s = 0;
    cout << "Enter a number:";
    cin >> n;
    k = n;
    while (k != 0) {
        d = k % 10;
        s += d * d * d;
        k /= 10;
    }
    if (s == n)
        cout << n << "is an armstrong number";
    else
        cout << n << "is not an armstrong number";
}