In a 3D Application Development, 3D objects can be displayed with 2D projection methods by using 2D / 3D mathematical calculations drawings. That may be hard to code and needs much coding skills to display them. We can use OpenGL and DirectX with their 3D functions/commands to display them. We can also use and port a 3D Engine SDK. In C++ Builder, 3D objects can be easily displayed by using…
Modern C++is very powerful with many great features to help you write programs more easily with safer template class objects that have faster algorithms and methods. In C++, Containersare the powerful data storage arrays in modern C++ and they are very useful for…
Containersare powerful data storage arrays in modern C++ and they are very useful to iterate and search data with their amazing methods and properties. A container is a holder object that stores data elements (a collection of data objects). std::vector, std::array…
What Are The Differences Between std::rand() And std::mt19937 In Modern C++?
February 2, 2024
Random numbers are widely used in today’s modern applications. In C we use rand(), srand() and in C++ it is std::rand(), std::srand(). Since C++11, we can use the Mersenne Twister random generators; mt19937 (std::mt19937) for 32-bit applications and mt19937_64 (std::mt19937_64) for 64-bit applications. Modern C++ allows us to use both old and new random generators. In this post, we explain…
Random numbers are one of the most important parts of today’s modern programming technologies. They are used in mathematics, physics, in many engineering fields, and in programming such as generating random data for testing, random maps in levels, random trees on a…
In C++ 17, there is a very useful alias template for metaprogramming that can be used to simplify use of SFINAE. The void_tis a meta-function that is used to map any types ( or types) to typevoid. In this post, we explain what is void_t, how you can use it in…
There is a new library feature in the C++17 standard, it is std::invoke which is a useful feature to uniformly invoke callable entities. In this post, we explain what std::invoke is and how we can use it in examples. First, let’s remind ourselves about what is a callable object and what is a functor in modern C++.
What is callable object and what is functor in modern…
Solving C++ optimization problems are one of the areas of all quantitative disciplines from social science, economics to engineering fields such as computer science. Genetic Algorithm (GA) is a kind of machine learning process that is used to generate high-quality…
In addition to many beneficial features of C++ 17, there are elementary string conversions introduced in that specification. The std::to_chars() and std::from_chars() are defined in <charconv> header to do conversions between numeric values to strings or strings to…
The C++ 17 standard bring us a lot of useful methods, templates and algorithms. One of the great algorithms is std::sample defined in the <algorithm> header that samples at most n elements uniformly from a given range. In this post, we explain the std::sample algorithm and how we can use it with an mt19937 random generator.
What is the std::sample algorithm in C++ 17 and beyond?
The…
