Merge pull request #1 from Meghna2080/Meghna-branch

Create Check_armstrong_number.cpp

Program's_Contributed_By_Contributors/Check_armstrong_number.cpp

@@ -0,0 +1,28 @@
+#include<iostream>
+#include<math.h>
+using namespace std;
+
+int main()
+{
+    int n,temp,remainder,x=0,ans=0;
+    cout<<"Enter a number:"<<endl;
+    cin>>n;
+    temp=n;
+    while(temp!=0){
+        temp=temp/10;
+        x++;
+    }
+    temp=n;
+    while(temp!=0)
+    {
+        remainder=temp%10;
+        int power=round(pow(remainder,x));
+        ans+=power;
+        temp=temp/10;
+    }
+    if(ans==n)
+        cout<<"Armstrong number";
+    else
+        cout<<"Not an armstrong number";
+    return 0;
+}