Server Side Programming Articles - Page 1862 of 2650

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 Type interference in C++ (auto and decltype). In the case of auto keyword, the type of the variable is defined from the type of its initializer. Further, with decltype, it lets you extract the type of variable from the called element. auto type Example Here is the following example of auto-type in C++. #include using namespace std; int main() { auto x = 4; auto y = 3.37; auto ptr = & x; cout

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

The C++ STL (Standard Template Library) is a powerful set of C++ template classes to provide general-purpose classes and functions with templates that implement many popular and commonly used algorithms and data structures like vectors, lists, queues, and stacks.It is a library of container classes, algorithms, and iterators. It is a generalized library and so, its components are parameterized. Working knowledge of template classes is a prerequisite for working with STL.Templates are a feature of the C++ programming language that allows functions and classes to operate with generic types. This allows a function or class to work on many different ... Read More

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

In this article we will be discussing the working, syntax and examples of forward_list::clear() and forward_list::erase_after() functions in C++.What is a Forward_list in STL?Forward list are sequence containers that allow constant time insert and erase operations anywhere within the sequence. Forward lists are implemented as singly linked lists. The ordering is kept by the association to each element of a link to the next element in the sequence.What is forward_list::clear()?forward_list::clear() is an inbuilt function in C++ STL which is declared in header file. clear() is used when we have to remove all the elements of the forward list at ... Read More