bad_apple_os/src/app/main.cpp

#include <cstdio>

#include <cassert>

extern "C" void main()
{
    std::puts("Hello, kernel World!");

    while (true)
    {
        for (char chr = 'A'; chr <= 'Z'; ++chr)
        {
            std::printf("char: %c", chr);
        }
    }
}