diff --git a/countsetbbits(V eff 1 BrianKernigam).cpp b/countsetbbits(V eff 1 BrianKernigam).cpp
new file mode 100644
index 0000000..53a225f
--- /dev/null
+++ b/countsetbbits(V eff 1 BrianKernigam).cpp	
@@ -0,0 +1,21 @@
+#include <iostream>
+using namespace std;
+
+
+int countbits(int n)
+{int res=0;
+   while(n>0)
+   {n=(n&(n-1));
+   res++;
+   }            
+   return res;
+}
+
+int main()
+{int x;
+    cout << "Enter a number"<<endl;
+cin>>x;
+
+ cout<<countbits(x);
+      return 0;
+}
\ No newline at end of file