/*
* This function adds a child to the family. The child is inserted at the of the
* linked list of children. In order to i=add the child to the end of the list,
* the function checks whether the list is empty, if there is already one child,
* or if there are more than one child. If there is no children in list, the
* child is added at the head of the list. If there is already one child, the
* the child is added after the first child. If there is more than one child in
* the list, then the end of the list is searched for and the child is added at
* the end.
*
* @param: Child* const &child - pointer to child to be added to list of children
* @attribute: Child *children - head pointer to linked list of children
*/
void Wife::addChild(Child* const &child)
{
if(children == NULL){
children = child;
}
else if(children->getSibling() == NULL){
children->setSibling(child);
}
else{
Child *curr = children;
while(curr->getSibling() != NULL){
curr = curr->getSibling();
}
curr->setSibling(child);
}
}
/*
* This function removes a child from the linked list of children. The child is
* searched for using their social security number. To search the list and delete
* a child, two steps must be performed. The first step is to check if the first
* chlid in the list is the child to be deleted. If not, then the rest of the
* list is searched. These two steps are necessary because they each require
* different procedures to remove a child from the list.
*
* @param: const long &ssn - social security number associated with child
* to search for
* @attribute: Child *children - head pointer to linked list of children
*/
bool Wife::removeChild(const long &ssn)
{
if(children == NULL){
return false;
}
// check if first child is to be removed
if(children->getSSN() == ssn){
Child *child = children;
children = child->getSibling();
delete child;
return true;
}
// set current child to second child and previous child to first child
Child *prevChild = children;
Child *currChild = children->getSibling();
// if child exists in the rest of the list of children, point previous
// child's sibling pointer to the child after the child to be deleted
while(currChild != NULL){
if(currChild->getSSN() == ssn){
prevChild->setSibling(currChild->getSibling());
break;
}
else{
prevChild = currChild;
currChild = currChild->getSibling();
}
}
// if child found, delete child and return true, else false
if(currChild != NULL){
delete currChild;
return true;
}
else{
return false;
}
}