Running functions before and after main() (works on gcc and g++)

Startup_Exit.h

/*
Usage :
"test.cpp"
----------
#include <iostream>

#define _START_ begin
#define _EXIT_ end
#include "Startup_Exit.h"

void begin()
{
	std::cout << "Running before main()\n";
}

void end()
{
	std::cout << "Running after main()\n";
}

int main()
{
	std::cout << "Running main\n";
}
*/

#ifndef START_EXIT_H
#define START_EXIT_H

#ifdef __GNUC__
void _START_ (void) __attribute__((constructor));
void _EXIT_ (void) __attribute__((destructor));
#endif

#endif