第一题写完辣

homework2/LinkList.h

@@ -16,4 +16,5 @@ void create(bookList &l);
 
 void display(bookList *l);
 
+int getLength(bookList *l);
 #endif //LINKLIST_H

homework2/LinkLits.cpp

@@ -47,3 +47,16 @@ void display(bookList *l) {
         }
     }
 }
+
+int getLength(bookList *l) {
+    if (isEmpty(l)) {
+        return 0;
+    }
+    bookNode *temp = (*l)->next;
+    int length = 0;
+    while (temp != NULL) {
+        length++;
+        temp = temp->next;
+    }
+    return length;
+}

homework2/test1.cpp

@@ -7,6 +7,7 @@ int main() {
     bookList books = new bookNode;
     books->next = NULL;
     create(books);
+    cout << getLength(&books) << endl;
     display(&books);
     return 0;
 }