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

int main(void)
{
	int *list = malloc(3 * sizeof(int));
	if(list ==NULL)

	list[0] = 1;
	list[1] = 2;
	list[2] = 3;
	
	// Time passes
	
	int *tmp = realloc(list, 4 * sizeof(int));
	
	if (tmp == NULL)
	{
		free(list);
		return 1;
	}

	// Copy old list into new list
	for (int i = 0; i <3; i++)
	{
		tmp[i] = list[i];
	}
	tmp[3] = 4;

	// Free original list
	free(list);

	list = tmp;
		
	for (int i = 0; i <3; i++)
	{
		printf("%i\n", list[i]);
	}
	free(list);
	return 0;
}