From a30ddcbb20a99dc5ec7f3cecee7cc8a249eabe43 Mon Sep 17 00:00:00 2001
From: anujparwal <anujparwal7787@gmail.com>
Date: Thu, 23 Oct 2025 13:07:04 +0530
Subject: [PATCH 1/2] Added Armstrong Number checker

---
 .../mathematical/armstrong_number.cpp         | 65 +++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 CPP/algorithms/mathematical/armstrong_number.cpp

diff --git a/CPP/algorithms/mathematical/armstrong_number.cpp b/CPP/algorithms/mathematical/armstrong_number.cpp
new file mode 100644
index 00000000..8d688610
--- /dev/null
+++ b/CPP/algorithms/mathematical/armstrong_number.cpp
@@ -0,0 +1,65 @@
+/*
+Armstrong number: An Armstrong number is a number that is equal to the sum of its own 
+digits, each raised to the power of the total number of digits. 
+
+Author = Anuj Parwal
+*/
+#include<bits/stdc++.h>
+using namespace std;
+//Simple power function which is to be used later:
+long long int power(int base, int exp) {
+    long long int result = 1;
+    for (int i = 0; i < exp; i++) {
+        result *= base;
+    }
+    return result;
+}
+/*The following function checks whether or not the number provided is armstrong number or 
+not. If the number is an armstrong number, it will return 1 but if it isn't, 0 will be returned.
+*/
+int armstrong(long long int n){
+    int num_dig = 0;
+    long long int num_temp1 = n;
+    long long int num_temp2 = n;
+    for (int i = 0; i < 18; i++){
+        num_temp1/=10;
+        num_dig++;
+        if(num_temp1==0){
+            break;
+        }
+    }
+    /*Initialising sum, and then adding digits to the power of the number of digits to 
+    it*/
+    long long int sum = 0;
+    for (int i = 0; i < 18; i++){
+        int j = num_temp2%10;
+        sum += power(j, num_dig); 
+        num_temp2/=10;
+        if(num_temp2==0){
+            break;
+        }
+    }
+    //if it is an armstrong number, n=sum
+    if(sum==n){
+        return 1;
+    }
+    else{
+        return 0;
+    }
+}
+int main(){
+    //Initialising an taking input of number:
+    int n;
+    cout << "Enter your number here: ";
+    cin >> n;
+    int checker = armstrong(n);
+    if(checker==0){
+        cout << "No, it is not an armstrong number.";
+    }
+    else{
+        cout << "Yes, it is an Armstrong number.";
+    }
+    return 0;
+}
+/*Space Complexity = O(1)
+Time Complexity = O(n)*/
\ No newline at end of file

From 862b4f3fa8a7ecd7e9d8e219595a0b53f4e6890a Mon Sep 17 00:00:00 2001
From: anujparwal <anujparwal7787@gmail.com>
Date: Thu, 23 Oct 2025 13:09:16 +0530
Subject: [PATCH 2/2] Added Armstrong Number checker

---
 CPP/algorithms/mathematical/armstrong_number.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CPP/algorithms/mathematical/armstrong_number.cpp b/CPP/algorithms/mathematical/armstrong_number.cpp
index 8d688610..8d0fd270 100644
--- a/CPP/algorithms/mathematical/armstrong_number.cpp
+++ b/CPP/algorithms/mathematical/armstrong_number.cpp
@@ -48,7 +48,7 @@ int armstrong(long long int n){
     }
 }
 int main(){
-    //Initialising an taking input of number:
+    //Initialising and taking input of number:
     int n;
     cout << "Enter your number here: ";
     cin >> n;