diff --git a/version0.15/version0.15.1/newm.cpp b/version0.15/version0.15.1/newm.cpp
deleted file mode 100644
index 2484beb..0000000
--- a/version0.15/version0.15.1/newm.cpp
+++ /dev/null
@@ -1,29 +0,0 @@
-#include<iostream>
-using namespace std;
-class a
-{
-	public:
-		int A;
-		virtual void setA(int t)=0;
-		virtual int returnA()=0;
-};
-class b:public a
-{
-	public:
-		void setA(int t)
-		{
-			A=t;
-			return;
-		}
-		int returnA()
-		{
-			return A;
-		}
-};
-int main()
-{
-	b m;
-	m.setA(1);
-	m.returnA();
-	return 0;
-}