cpp-course/modules/01_fundamentals/src/hello_world.cpp

#include "hello_world.hpp"

#include <cstring>
#include <string>

namespace fundamentals {

auto greet(const char* name) -> const char* {
    const auto n = std::string(name);
    const auto c = "Hello, " + n + "!";
    // LESSON: Never return pointers to local objects -> dangling -> undefined behavior
    // NO! --> return c.c_str();
    // The destructor will be called when c goes out of scope, destroying the object and freeing its memory
    // This is shit C++ and should use std::string instead as a return value
    const auto p = new char[c.length() + 1]; // Give space for the null terminated pointer
    strcpy(p, c.c_str());
    return p;
    // TL;DR -> Never use C-style strings if possible
}

}  // namespace fundamentals