add inherit and class pointer casting

.drone.yml

@@ -8,3 +8,4 @@ steps:
 
       - cd class || exit
       - g++ construct.cpp -o construct && ./construct
+      - g++ inherit.cpp -o inherit && ./inherit

class/inherit.cpp

@@ -0,0 +1,53 @@
+#include <iostream>
+
+class Base1 {
+    virtual void func() {}
+    char ch;
+    // int val;
+};
+
+class Base2 {
+    virtual void func() {}
+    // char ch;
+    int val;
+};
+
+class Base3 {
+    // virtual void func() {}
+    char ch;
+    // int val;
+    // double val;
+};
+
+class Base4 {
+    // virtual void func() {}
+    // char ch;
+    int val;
+    // double val;
+};
+class Derived : public Base1, public Base2, public Base3, public Base4 {
+    virtual void func() {}
+    double val;
+};
+
+int main() {
+    Derived d1;
+    Derived* pd1 = &d1;
+    Base1* pb1 = &d1;
+    Base2* pb2 = &d1;
+    Base3* pb3 = &d1;
+    Base4* pb4 = &d1;
+
+    std::cout << "notice how those casts are performed according to member alignments" << std::endl;
+    std::cout << pd1 << std::endl
+              << pb1 << std::endl
+              << pb2 << std::endl
+              << pb3 << std::endl
+              << pb4 << std::endl;
+
+    std::cout << sizeof(Derived) << std::endl
+              << sizeof(Base1) << std::endl
+              << sizeof(Base2) << std::endl
+              << sizeof(Base3) << std::endl
+              << sizeof(Base4) << std::endl;
+}