//goes through list of bunnies and kills those over 10 and not radioactive or over 50 if radioactive
void BunnyWorld::killOldBunnies()
{
//point tracker to first 'dummy' bunny
Bunny* tracker = m_first;
//point next bunny to first 'real' bunny
Bunny* nextBunny = tracker->m_next;
/*
The program keeps bunnies in age order so only goes through the bunnies that are aged
10 or over to decide whether to kill it or not
*/
while (nextBunny->getAge() >= 10)
{
//if bunny is 50, always dies. If not radioactive, is 10 by the while condition so kill
if (nextBunny->getAge() == 50 || !nextBunny->getRadioactive()){
tracker->m_next = nextBunny->m_next;
killBunny(nextBunny);
}
else
tracker = tracker->m_next;
nextBunny = tracker->m_next;
/*
if we've reached the end of the list (no bunnies under 10) break out of while loop.
It's implemented like this because the while loop requires a getAge call which doesn't
work for the nullptr pointer.
*/
if (nextBunny==nullptr){
break;
}
}
}
/*
For every female aged 2 or older and not radioactive, give birth to a new bunny of the same color
and place it at the end of the list
*/
void BunnyWorld::giveBirth()
{
Bunny* tracker = m_first->m_next;
//find last bunny in list.
Bunny* findEnd = tracker;
while (findEnd->m_next != nullptr){
findEnd = findEnd->m_next;
}
//go through whole list
while (tracker != nullptr){
if (tracker->getSex() == bny::female && tracker->getAge() >=2 && !tracker->getRadioactive()){
int color = tracker->getColor();
Bunny* newBunny = new Bunny(color);
//put new bunny at end of list
newBunny->m_next = nullptr;
findEnd->m_next = newBunny;
findEnd = newBunny;
m_population++;
if (newBunny->getRadioactive()){
m_radioactivePopulation++;
}
}
tracker = tracker->m_next;
}
}
//Check to see if there is a Bunny with age >=2 and not radioactive in the population
bool BunnyWorld::isEligibleMale() const
{
Bunny* tracker = m_first->m_next;
while(tracker!=nullptr){
if (tracker->getAge() >= 2 && tracker->getSex() == bny::male && !tracker->getRadioactive()){
return true;
}
tracker = tracker->m_next;
}
return false;
}
