Please answer in C++ code, I don't know what I'm doing wrong.

Question:

Complete the function stringList that accepts a Node * (the head of a linked list) as a parameter and creates a string out the list in the following format:

Node 0: 100 -> Node 1: 200 -> Node 2: 300 If the list is empty then the function should return "Empty list".

This time we do not provide you with local test cases. You should write your own test cases. In main.cpp, you should test your stringList in, at least, the following cases:

An empty list A list with exactly one node A list with more than one node (eg: 100 -> 200 -> 300, as shown above)

test.h:

#ifndef TEST_H #define TEST_H

#include

using namespace std;

struct Node { int data_; Node *next_; };

string stringList(Node *n);

#endif

test.cpp:

#include "test.h" #include

using namespace std;

string stringList(Node *head) { int count = 0; Node* temp = head; if (head == NULL) { return "Empty list"; } else { while (temp != NULL) { count++; cout << temp->data_ << " "; temp = temp->next_; } } return "Node " + to_string(count) + ": " + to_string(temp->data_) + " -> "; }

main.cpp:

#include "test.h" #include using namespace std;

int main() { // Test 1: An empty list Node * head = NULL; cout << stringList(head) << endl;

// Test 2: A list with exactly one node // Test 3: A list with more than one node

return 0; }