As a seasoned programmer, you must know that C++ is a general-purpose programming language with significant influence on other languages like C, C#, Objective-C, Java, and even newer ones like Rust and Swift. But for WebAssembly, the synergy between C++ and Wasm is amplified due to the former's maturity, performance benefits, and substantial codebase.

C++ is an extension of the C language, but it's unique in its support for Object-Oriented Programming (OOP) and Generic Programming. These features, especially OOP, allow for better code reusability and make your code more intuitive and easy to follow.

Let's delve into some basic concepts of C++, that you must be familiar with:

• Variables and Basic Data Types: C++ supports various data types, including but not limited to, integers (int), floating-point numbers (float, double), and characters (char), along with the familiar operations for manipulating these data types.

• Control Flow: Akin to most programming languages, C++ offers constructs for control flow maneuvres, such as if, else, while, for, and so on.

• Functions: Functions in C++ help us encapsulate and reuse code. They follow a binomial structure that includes a return type, name, parameters, and body.

• Object-Oriented Programming: C++ supports OOP through classes. Classes are blueprints using which you can create objects. Classes have data members (attributes) and member functions (behavior). The concept of encapsulation, inheritance, and polymorphism are key principles in C++ OOP.

• C++ Standard Template Library (STL): STL is a powerful library in C++ that provides generic templates for various common algorithms and data structures, which aids in fast development involving complex data manipulations.

In the following lessons, we're going to use some of these concepts to compile C++ code into WebAssembly. So even though you may be familiar with all of this being a senior engineer, it serves as a good refresher to achieve our end goal - mastering WebAssembly!

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#include <iostream>

using namespace std;

​

// defining a simple function

int add(int x, int y) {

  return x + y;

}

​

int main() {

  int a = 5, b = 3;

  cout << "Sum of a and b is: " << add(a, b) << endl;

  return 0;

}