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

int function1(int argument) 
{ 
    int * p = (int *) malloc(sizeof(int));
    int k[10];

    printf("%s\n", __FUNCTION__); 
    free(p);
    
    return argument; 
}

struct Document
{
    Document * head;
    Document * tail;

    Document() { printf("%s\n", __FUNCTION__); }
    ~Document() { printf("%s\n", __FUNCTION__); }
    
    int foo(int argument) { printf("%s\n", __FUNCTION__); return argument; }
};

int function2(int argument) 
{ 
    int * p = (int *) malloc(sizeof(int));
    int k[10];

    printf("%s\n", __FUNCTION__); 
    
    return argument; 
}

Document * bar()
{
    Document * document = (Document *) malloc(sizeof(Document));
    
    // cycle
    document->head = (Document *) malloc(sizeof(Document));
    document->head->head = (Document *) malloc(sizeof(Document));
    document->head->head->head = document;
    
    return document;
}

int main()
{
    int temporary = 1;
    
    Document * document = (Document *) malloc(sizeof(Document) * 5);
    
    printf("%i\n", 1);
    int result = bar()->foo(temporary);
    printf("%i\n", 2);
    
    function1(1);
    function2(1);
    
    printf("%p\n", document);
    printf("%i\n", 3);
}