In this article, we will discuss pure virtual functions in C++ and usage with examples. Let’s dive into the definition of pure virtual function. So what is pure virtual function? A pure virtual function is a function, that must be overriden in the derived class need not to be defined A virtual function can be … Read more
In this article, we will discuss different ways to read strings from input in C++. The cin object and getline function can be used to read strings. Using the cin to read string input In this example, we will use cin object to read strings. The cin is an istream object. Output Note that there … Read more
Sometimes we may need to update already installed specific software packages (Firefox, Nginx, etc) in Ubuntu. In this article, we will discuss a way to update a software package using the terminal. If we run sudo apt upgrade command it will update all the packages. We can update a specific software package by following the … Read more
In this article, we will discuss virtual destructors in CPP. Destructor is part of Resource Acquisition Is Initialization(RAII) programming idiom. The basic idea of RAII is constructor will acquire(allocate) resources and the destructor will release resources for a class. The most common example of a destructor is when the constructor uses new, and the destructor … Read more
In this article, we will discuss the size of C++ classes. We will look into an empty class, a class with member function, a class with virtual functions, and a class with data members. We will be using a 64-bit machine to compile the test code. For a 64-bit machine, the pointer size is 8 … Read more
Sometimes we need to test internet speed and we shall use websites like speedtest.net,fast.com etc but in this article, we will discuss a way to check internet speed from the terminal. We can use speedtest.net CLI(Command-line interface) tool to check the internet speed. Install speedtest CLI on Ubuntu/Debian Firstly, install curl using the below command. … Read more
In this article, we will discuss various methods to check substring in python string. There are two ways to check substring in python. Using the in operator The simplest way to check the substring python string is using the in operator. To test the membership we can use in and not in operators. For strings, … Read more
In this article, we will discuss how to install redis on WSL. Redis is an in-memory key-value data structure store, used as a memory key-value database, cache, and message broker. Officially, the redis is not supported on Windows. However, we can run it on WSL (Windows Subsystem for Linux). We will be using Windows 10 … Read more
Have you ever thought about the shortest C++ program? In this article, we’ll look into the shortest C++ program. C++ is a compiled language. Firstly, the compiler processes the source code files and produces object files. The linker will combine these object files to yield an executable program. Let’s look into the smallest C++ program … Read more
In this article, we will discuss various methods to convert std::string to int in C++. 1.Convert string to int using atoi function The atoi function parses C-style string (null-terminated) content as an integer. Syntax of atoi Defined in header <cstdlib> (stdlib.h) Arguments str – C- style null-terminated string Returns On success, returns the converted number … Read more