Write down a program structure of c plus plus?

Answer 1

C++ programs are structured with data types and functions, much like C before it. However, unlike C, data types and functions can be combined to create entities that encapsulate a set of data and provide an interface to operate upon that data. These data types are known as classes, from which objects can be instantiated. Classes may also contain static data and methods which are local to the class rather than to a specific instance of the class. Although C++ is a general purpose, object-oriented programming language, it is also backwardly compatible with C and programs can be written using 4 different programming styles: procedural programming, data abstraction, object-oriented programming and generic programming. Most C++ programs are written using a combination of these styles.

Answer 2

The following is a program with 4 classes and a structure. Constructors and destructors are generated automatically by the compiler so you really only need them if you need more specialised construction. However, a user-defined constructor and destructor have been declared in class A.

You don't give any details on what the program should actually do, so it's up to you to fill in the details. As it stands, this program does nothing useful whatsoever, but it has everything you asked for.

#include<iostream>

class A{

A() {} //constructor

~A() {} // destructor

};

class B : public A {};

class C : protected B{};

class D : private C {};

struct E : public A {};

int main()

{

A a;

B b;

C c;

D d;

E e;

}