Armstrong Numbers

Armstrong_Num.cpp 
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
#include <bits/stdc++.h>
using namespace std;

string Armstrong_Num(int n){
    int Num = n;
    int armstrong_Num = 0;
    int len = floor(log10(n) + 1);
    while(n > 0) {
        int digit = n%10;
        armstrong_Num += pow(digit, len);
        n /= 10;
    }
    return armstrong_Num == Num ? "true" : "false";
}

int main() {
    int n;
    cin >> n;
    cout << Armstrong_Num(n);
    return 0;
}

Input: 1634 # (1)!
Output: true
  1. \(1^4 + 6^4 + 3^4 + 4^4 = 1634\)