Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
In this tutorial, we will be discussing a program to understand virtual functions in C++.Virtual function is the member function defined in the base class and can further be defined in the child class as well. While calling the derived class, the overwritten function will be called.Example Live Demo#include using namespace std; class base { public: virtual void print(){ cout
In this tutorial, we will be discussing a program to understand virtual destruction using shared_ptr in C++.To delete the instances of a class, we define the destructor of the base class to be virtual. So it deletes the various object instances inherited in the reverse order in which they were created.Example Live Demo#include #include using namespace std; class Base { public: Base(){ cout
In this tutorial, we will be discussing a program to understand virtual base class in C++.Virtual classes are primarily used during multiple inheritance. To avoid, multiple instances of the same class being taken to the same class which later causes ambiguity, virtual classes are used.Example Live Demo#include using namespace std; class A { public: int a; A(){ a = 10; } }; class B : public virtual A { }; class C : public virtual A { }; class D : public B, public C { }; int main(){ //creating class D object D object; cout
In this tutorial, we will be discussing a program to understand how to use class to implement vector quantities in C++.Vector quantities are the ones which have both magnitude and direction. Here we will be implementing them using classes and then performing basic operations on them.Example Live Demo#include #include using namespace std; class Vector { private: int x, y, z; //components of the Vector public: Vector(int x, int y, int z){ this->x = x; this->y = y; this->z = z; } Vector operator+(Vector ... Read More
In this tutorial, we will be discussing a program to understand trivial classes in C++.When a class/ struct contains explicitly defaulted value inside it, then it is known as Trivial classes. Further trivial classes have their own constructor, assignment operator and destructor.Example//using the default constructor struct Trivial { int i; private: int j; }; //defining your own constructor //and then marking it as default struct Trivial2 { int i; Trivial2(int a, int b){ i = a; } Trivial2() = default; };Output(No output as we are just defining classes here and not creating object instances from them.)
In this tutorial, we will be discussing a program to understand the transform_inclusive_scan() function in C++.Example Live Demo#include #include using namespace std; namespace point_input_iterator { template OutputItrator transform_inclusive_scan(InputItrator first, InputItrator last, OutputItrator d_first, BinaryOperation binary_op, UnaryOperation unary_op){ *d_first = unary_op(*first); first++; d_first++; for (auto it = first; it != last; it++) { //calculating the prefix sum *d_first = binary_op(unary_op(*it), *(d_first ... Read More
In this tutorial, we will be discussing a program to understand thread get_id() function in C++.Thread get_id() function verifies the current state of the process and then returns the id for the current thread in execution. This function doesn’t take any parameters.Example#include #include #include using namespace std; //creating thread void sleepThread(){ this_thread::sleep_for(chrono::seconds(1)); } int main(){ thread thread1(sleepThread); thread thread2(sleepThread); thread::id t1_id = thread1.get_id(); thread::id t2_id = thread2.get_id(); cout
In this tutorial, we will be discussing a program to understand containership in C++.The parameter if a certain class contains another class is called as containership. The inside class is called contained class, while the class in which it is present is called container class.Example Live Demo#include using namespace std; class first { public: first(){ cout
In this tutorial, we will be discussing a program to understand constructors in C++.Constructors are member functions of the classes which initiates the object instance creation. They have the same name as the parent class and don’t have any return type.Default constructorsExample Live Demo#include using namespace std; class construct { public: int a, b; //default constructor construct(){ a = 10; b = 20; } }; int main(){ construct c; cout
Default constructors in Java:A constructor initializes an object when it is created. It has the same name as its class and is syntactically similar to a method. However, constructors have no explicit return type. There are two types of constructors namely −parameterized constructors − Constructors with arguments.no-arg constructors − Constructors without arguments.Example Live Demopublic class Sample{ int num; Sample(){ num = 100; } Sample(int num){ this.num = num; } public static void main(String args[]){ System.out.println(new Sample().num); System.out.println(new Sample(1000).num); } }Output100 1000Default ConstructorIt ... Read More