armstrong number

.gitignore

@@ -0,0 +1,3 @@
+**/*.out
+.vscode
+.cph

armstrong_number.cpp

@@ -0,0 +1,34 @@
+#include<iostream>
+#include<math.h>
+
+using namespace std;
+
+int main() {
+	int n, n_copy;
+	int digits = 0;
+	int sum = 0;
+
+	cin>>n;
+
+	n_copy = n;
+
+	while (n_copy >= 1) {
+		digits++;
+		n_copy /= 10;
+	}
+
+	n_copy = n;
+
+	while (n_copy >= 1 ) {
+		sum += pow(n_copy%10, digits);
+		n_copy /= 10;
+	} 
+
+	if(n == sum ){ 
+		cout<<n<<" is an armstrong number.";
+	}else {
+		cout<<n<<" is not an armstrong number.";
+	}
+
+	return 0;
+}