Program crashes when trying to add node to linked list - c++

Question

I wrote this program, and it crashes when I compile. It says the executable has stopped working and Windows is trying to find a solution. I believe the issue is somewhere in this addPage function I wrote to add a node to a linked list, but I'm not sure what is causing the issue.
void initPage(struct page *head, string programName) {
// Assign Properties of the First Node in the Linked List
head->programName = programName;
head->nextPage = NULL;
}
void addPage(struct page *head, string programName) {
// Initialize First Page if Not Initialized
if (head == NULL) {
initPage(head, programName);
return;
}
// Setup the New Page
page *newPage = new page;
newPage->programName = programName;
newPage->nextPage = NULL;
// Set the Pointer to the Beginning of the Linked List
page *current = head;
// While Traversing the Linked List
while(current) {
// If the End of the List is Reached, Append the Page
if (current->nextPage == NULL) {
current->nextPage = newPage;
return;
}
// Grab the Next Page (If not at the End of the Page)
current = current->nextPage;
}
}

Answer 1

This:
if (head == NULL) {
initPage(head, programName);
passes a null to initPage, which then immediately dereferences it. Boom.
Tip: ALWAYS check a pointer for null before using it.
Also, initPage is an incomplete copy of code in addPage. It seems better to always run the code in addPage that creates the new page (i.e., don't call initPage() at all) and then, once you've got a page, test head for null to see if you should just set head to the new page or iterate the list looking for the end.