#include <stdlib.h>
#include <stdio.h>

// prototypes
void funct1(void), funct2(void), funct3(void);

int main(void)
{
	// first-in last-out
	atexit(funct1);
	atexit(funct2);
	atexit(funct3);
	printf("This is executed first.\n");

	return 0;
}

void funct1()
{
	printf("This is executed fourth.\n");
}

void funct2()
{
	printf("This is executed third.\n");
}

void funct3()
{
	printf("This is executed second.\n");
}