The process of compiling C++ code to WebAssembly involves several tools. Let's get your development environment set up, to ensure an effective learning journey.

First and foremost, you need a modern web browser that supports the WebAssembly JavaScript APIs. Current versions of Firefox, Chrome, Safari, and Edge will do the trick.

Secondly, you need to have Emscripten installed on your machine. Emscripten is a source-to-source compiler that compiles C and C++ code to WebAssembly or JavaScript. Its significant role in our process is to provide bindings from WebAssembly to the host environment (the web browser).

Here are the steps you can follow to install it:

1. Clone the Emscripten repo from Github

1#include <iostream>
2using namespace std;
3int main() {
4  // This is just a placeholder to indicate the start of installing Emscripten
5  cout << "Cloning Emscripten Repo from Github...";
6}

2. Navigate to the folder in the Terminal and check out the latest stable branch

3. Next, fetch the latest registry of precompiled Emscripten Ports libraries.

1#include <iostream>
2using namespace std;
3int main() {
4  // This is just a placeholder to indicate the end of installing Emscripten
5  cout << "Completed all steps needed for installing Emscripten!";
6}

To verify the success of the installation, try compiling a simple 'Hello, World!' C++ program. You should see the program output in the terminal. With this environment, you're now ready to delve into the world of WebAssembly.

Remember, in case of errors, carefully read the error messages, they often provide clues about what's going wrong. In the worst-case scenario? Google is always your best friend when it comes to troubleshooting.

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#include <iostream>

using namespace std;

int main() {

  // Replace with your c++ logic here

  cout << "Hello, WebAssembly!";

}