Invalid Pointer Passed By Address-of(&) Operator - c++

Question

Alright, so I'm practicing with C++ classes and pointers. When suddenly...
If I try to get the address of my object passed in the parameters, it gives me an invalid address.
What is going on here?
P.S You can ignore the if statement, it shouldn't be relevant to this particular problem.
Picture of the Problem
.
int ChainLinkz::chainCount = 0;
ChainLinkz::ChainLinkz(int i) {
data = i;
chainID = chainCount++;
fLink = this;
addr = this;
nLink = 0;
printf("Created Link with Value: %i Addr: %x.\n", data, this);
}
ChainLinkz *ChainLinkz::next() {
if (nLink)
return nLink;
else
return 0;
}
ChainLinkz *ChainLinkz::last() {
ChainLinkz * lastLink = fLink;
while (lastLink->next()) {
lastLink = lastLink->next();
}
return lastLink;
}
ChainLinkz ChainLinkz::addLink(ChainLinkz link) {
if (link.nLink) {
if (&link == link.fLink) { // Replace fLink with new address in all instances of previous chain | Fix the old chain
ChainLinkz *t_link = link.nLink;
while (t_link->next()) {
t_link = t_link->next();
t_link->fLink = link.nLink;
}
} else { // Replace nLink for previous link | Fix the old chain
ChainLinkz *t_link = link.fLink;
while (t_link != &link)
t_link = t_link->next();
t_link->nLink = link.next();
}
}
last()->nLink = link.addr;
printf("\n&link: %x | Real Addr: %x \n\n", (ChainLinkz*)&link, link.addr);
link.nLink = 0; //Update values to new chain
link.fLink = fLink;
return link;
}
ChainLinkz ChainLinkz::addLink(ChainLinkz *link) {
printf("Overloader: %x.\n", link);
return addLink(*link);
}
ChainLinkz ChainLinkz::operator>>(ChainLinkz link) {
return addLink(link);
}
ChainLinkz ChainLinkz::operator>>(ChainLinkz *link) {
printf("Overloader: %x.\n", link);
return addLink(*link);
}

Answer 1

Solved the problem by using references instead of passing the object itself.
ChainLinkz ChainLinkz::addLink(ChainLinkz &link) {
printf("Overloaded New: %p\n", &link);
return addLink(&link);
}
ChainLinkz ChainLinkz::addLink(ChainLinkz *link) {
if (link->nLink) {
if (link == link->fLink) { // Replace fLink with new address in all instances of previous chain | Fix the old chain
ChainLinkz *t_link = link->nLink;
while (t_link->next()) {
t_link = t_link->next();
t_link->fLink = link->nLink;
}
}
else { // Replace nLink for previous link | Fix the old chain
ChainLinkz *t_link = link->fLink;
while (t_link != link)
t_link = t_link->next();
t_link->nLink = link->next();
}
}
last()->nLink = link;
link->nLink = 0; //Update values to new chain
link->fLink = fLink;
return *link;
}
ChainLinkz ChainLinkz::operator>>(ChainLinkz &link) {
return addLink(&link);
}
ChainLinkz ChainLinkz::operator>>(ChainLinkz *link) {
printf("Overloaded: %p.\n", link);
return addLink(link);
}