[sourcecode84]

Problem

The repo had no trivial C++ starter that a standard compiler can build and run. This adds a classic Hello World so a greeting can be printed to stdout with g++/clang++.

Solution

A self-contained example under examples/hello_world:

#include <iostream>

int main() {
    std::cout << "Hello, World!" << std::endl;
    return 0;
}

Build and run:

cd examples/hello_world
make run

Or without make:

g++ -std=c++17 -Wall -Wextra -Werror -O2 -o hello_world main.cpp
./hello_world

Expected stdout: Hello, World!

Verified locally with g++ 13.3.0 (make run exits 0).

Files

• examples/hello_world/main.cpp — Hello World source
• examples/hello_world/Makefile — all / run / test / clean
• examples/hello_world/README.md — build instructions
• examples/hello_world/.gitignore — compiled binary

No application code, Python, or TypeScript is changed. The example sits beside other non-app samples under examples/ and does not affect backend/frontend CI jobs.

Notes

• C++17, -Wall -Wextra -Werror
• Do not merge until review/QA sign off