Luna/apps/app.c

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

void bye()
{
    printf("byeee!\n");
}

int main()
{
    atexit(bye);
    printf("Welcome to %s from userspace!\n", "Luna");

    char* address = (char*)malloc(1);
    printf("address: %p\n", address);
    printf("memory at address: %c\n", *address);
    *address = 'e';
    printf("memory at address: %c\n", *address);

    free(address);

    time_t now = time(NULL);
    printf("date: %s", ctime(&now));
}