Nerdiest Birthday Message ever.

bday.cpp

#include <string>
#include <algorithm>
#include <iostream>

#define __A "!zbei"
#define __B "zqqbI"
#define __C "\"mmjX"
#define __D "usjc!"

class App
{
public:
    App(const void *p)
        : mStrMsg(static_cast<const char *>(p))
    {}
    
    ~App()
    {
        auto f = [](char c) -> char { return c -1; };
        std::for_each(mStrMsg.rbegin(), mStrMsg.rend(), [&](char c) { std::cout << f(c); });
        std::cout << std::endl;
    }
    
private:
    std::string mStrMsg;
};

int main(int, char **)
{
    App a(static_cast<const void *>(__C __A __D __B));
}