update

basic_content/sizeof/virinhe.cpp

@@ -0,0 +1,38 @@
+/**
+ * @file virnhe.cpp
+ * @brief 虚继承
+ * @author 光城
+ * @version v1
+ * @date 2019-07-21
+ */
+
+#include<iostream>
+
+using namespace std;
+
+class A
+{
+    virtual void fun() {}
+};
+
+class B
+{
+    virtual void fun2() {}
+};
+class C : virtual public  A, virtual public B
+{
+    public:
+        virtual void fun3() {}
+};
+
+
+int main()
+{
+
+    /**
+     * @brief 8 8 16  派生类虚继承多个虚函数，会继承所有虚函数的vptr
+     */
+    cout<<sizeof(A)<<" "<<sizeof(B)<<" "<<sizeof(C);
+
+    return 0;
+}