code to check Armstrong numbers in C++

 #include <iostream>

#include <cmath>

using namespace std;

int main() {

    int n = 153;  // Change this number to test other values

    int num = n;

    int cubeSum = 0;

    while (num > 0) {

        int lastDig = num % 10; // Gets the last digit

        cubeSum += lastDig * lastDig * lastDig; // Adds the cube of the digit

        num /= 10;  // Removes the last digit

    }

    if (n == cubeSum) {

        cout << n << " is an Armstrong number." << endl;

    } else {

        cout << n << " is not an Armstrong number." << endl;

    }

    return 0;

}