we must implement a virtual function declare them as dynamic use inheritance for the objects. declare them as const

need help with c++...Please explain the code and the question TOO.

C++ language (Composition problem) Given the following two classes A and B, where all member functions have been fully implemented inline. class A { public: void f(int arg) { data = arg; } int g() { return data; } private: int data; }; class B { public: A x; }; int main() { B obj; // ... write code here return 0; } a. Insert the code in the main() function that assigns integer value 99 to the "data" member of obj, which is a B class object). b.Write the code to display the value (i.e., 99) that has just been assigned to the obj. c. Note that only a single object obj of B class is declared. How many times are constructors called? If more than one constructor is called, in what order are they called?

write in c++ Declare an arbitrary class and create an object of this class and write a prototype of the member function for you class that overloads assignment operator "="

Q2: Write a c++ program that implements the following UML diagram including functions and constructors' definitions. In addition to the user program code that declares object for each class and show how the derived class object uses the base class members. OOPCourse Student ID: int Grades[5]: int + setgrades(int arr[], int ): void + setID(int): int + setage(int): double + print():void + age:int + OOPstudent() OOPCourse OOPLAB OOPLab Reports[4]: int + setmarks(int arr[), int ): void + print():void + OOPLab()

C++ Language Create a UML Diagram for the Class Invoice with the provided code. Use <<constructor>> to define constructors, for each function's variable indicate whether it is a string or a integer. include <string> using namespace std; class Invoice{public:Invoice(string, string, int, int); void setPartNumber(string);string getPartNumber();void setPartDescription(string); string getPartDescription();void setQuantity(int); int getQuantity();void setPricePerItem(int); int getPricePerItem(); int getInvoiceAmount();private:string partNumber; string partDescription; int quantity; int pricePerItem; };