added a c++ program for palindrome to 'code' folder

code/palindrome.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+
+using namespace std;
+
+int main()
+{
+    long a,rev,b;
+    cout<<"\nenter the number :";
+    cin>>a;
+    b=a;
+    rev=0;
+    while(b)
+    {
+        rev=(rev*10)+(b%10);
+        b=b/10;
+    }
+    if(a==rev)
+        cout<<"\n the number IS a palindrome.";
+    else
+        cout<<"\n the number IS NOT a palindrome.";
+    return 0;
+}