Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Transcribed Image Text:A student implementing an unsorted linked list implemented this method:
1 void LinkedList::InsertAtEnd(int e) {
Node *neo;
4
neo = new Node;
neo->element = e;
nullptr;
6.
neo->next =
%3D
7.
if (nullptr == _head) {
head = neo;
}
else {
Node *ptr;
8.
6.
%3D
11
12
13
14
for (ptr = _head; ptr != nullptr; ptr = ptr->next) {
%3D
%3D
15
16
ptr->next
= neo;
17
18 }
When this code was tested, it was found to crash with a segmentation fault. What line generated the fault?
Expert Solution
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Segmentation Fault :
- Segmentation Fault is the runtime problem that mainly because of the following reasons :
- Referring to the null location.
- Wrong-way of comparing the value with the null value.
- Assigning an invalid location to the pointer variable.
- Here, in this case for line number -> 8, the nullptr == _head.
- This line gives the segmentation fault as the order of the test condition is not correct.
- The correct test condition is _head == nullptr.
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