added armstrong and fibonacci program

Author: Preeti amurya

basics/armstrong.cpp

@@ -0,0 +1,24 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    int num , original, rem,result=0;
+    cout<<"enter the three digit number";
+    cin>>num;
+    original=num;
+    whlie(original!=0){
+        //remender contain last digit
+        rem=original%10;
+        result += rem*rem*rem*rem;
+
+        // removing last digit from the original number
+        original=original/10;
+    }
+    if(result==num)
+    cout<<num<<"it is an Armstrong number";
+    else
+    cout<<num<<"it is not armstrong number";
+
+    return 0;
+}

basics/fibonacci.cpp

@@ -0,0 +1,19 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    int first=0,second=1,sum=0,n;
+    cout<<"Enter the end term for the series";
+    cin>>n;
+    cout<<"fibonacci series :"<<first<<""<<second;
+
+    sum=first+second;
+    while(sum<=n){
+        cout<<sum<<"";
+        first=second;
+        second=sum;
+        sum=first+second;
+    }
+    return 0;
+}