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Add check for NULL list head in makeEmpty

This commit is contained in:
Shaun Reed 2020-04-26 18:12:09 -04:00
parent ac46149191
commit 58d77e09cd
2 changed files with 4 additions and 2 deletions
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plates/linkedlists/a.out
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6
plates/linkedlists/singlelist.cpp
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@ -130,8 +130,10 @@ bool SingleList::replace(int val, int key)
*/ */
void SingleList::makeEmpty() void SingleList::makeEmpty()
{ {
Node *nextNode = head->next; Node *nextNode, *temp;
Node *temp;
if (head == NULL) return;
nextNode = head->next;
delete head; delete head;
head = NULL; head = NULL;
while(nextNode != NULL) { while(nextNode != NULL) {