Clown_pantaloons.cpp

#include <iostream>

using namespace std;

class Cons
{
    public:
    enum {INT, DOUBLE, CHAR, STRING} value_type;
    union
    {
        int i;
        double d;
        char c;
        std::string s;
    };
    Cons(char new_char)
    {
        this->my_type = CHAR;
        this->c = new_char;
    }

    Cons(double new_double)
    {
        this->my_type = DOUBLE;
        this->d = new_double;
    }

    Cons(int new_int)
    {
        this->my_type = INT;
        this->i = new_int;
    }

    //Cons(std::string new_string)
    //{
        //this->my_type = STRING;
        //this->s = new_string;
    //}

    int get_type()
    {
        return my_type;
    }

    private:
    int my_type = 0;

};

std::string cons_to_string(Cons& cons)
{
    switch(cons.get_type())
    {
    case Cons::INT: return std::to_string(cons.i);
    case Cons::DOUBLE: return std::to_string(cons.d);
    case Cons::CHAR: return std::string(1, cons.c);
    //case Cons::STRING: return cons.s;
    }
}

int main()
{
   cout << "Hello World" << endl;
   Cons my_array[] = {Cons(32), Cons('h'), Cons(45.5), Cons('H')};
   for(Cons& c : my_array)
   {
       std::cout << cons_to_string(c) << std::endl;
   }
   std::cout << "Hello world!" << std::endl;
   return 0;
}