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What Are Generalized Constant Expressions (constexpr) In C++?

C++ is really awesome programming language that has many options to use variables in a way which can make your C++ App use less memory and app size. In this post, we explain what are a constant, a constant expression and generalized constant expressions in modern C++. What is the const constant keyword in modern C++? Let’s remember that, in C++ there are two ways to define constants.
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Is C++ A Functional Programming Language?

C++ is highly evolved and mature programming language. The C++ language has a great set of choices of modern C++ IDE and compilers all of which come with a lot of tools, GUI components and libraries.  By using C++, you can create functional programs to solve complex engineering problems, you can simulate and analyze with 2D/3D graphics, create 3D environments, and add your custom 3D objects…
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The Main Function of a C++ Program

The source code written in C++ must be compiled (i.e. translated to the machine code) by one or another compiler such as Embarcadero RAD Studio C++ compilers before in can be runned. In general, there are two types of the resulting machine code: library and main executable…
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General Loop Statements in Modern C++

Each loop statement in C++ has its loop body which is executed repeatedly until the loop condition expression that yields a loop condition becomes false (otherwise, the loop will run “forever”). The statement continue can be used to interrupt the current iteration and skip the rest of the loop body to immediately check the loop condition before continuing. A whole loop statement can be…
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Switch Statement in Modern C++

The C++ language provides the switch statement which can be used to replace the set of if statements (see If Statements in Modern C++). First of all, let’s define the enum type Traffic_light_color as follows: enum class Traffic_light_color { red, yellow, green…
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Helpers for Generic C++ Code Iterating Over Sequences

The iterator library that is part of the C++ Standard Library provides the following helpers for writing generic code: #include <iterator> // helpers are defined here template<class Container> void foo(Container& c) { // Generic way to obtain (constant) iterators auto b = std::begin(c); // (1) auto cb = std::cbegin(c); // (2) auto e = std::end(c); //…
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