Adding Nodes or Data in a Linked List. Not Working?

[velvet iris]

Hello, I was trying to add the data in the inputted Nodes for example, if I entered in 1 2 3 4 5,

it would add 1 + 2 + 3 + 4 + 5 = 15
but it just does not show the addNodes at all..

am I prepending wrong?

#include <iostream>
using namespace std;

struct Node{
    int data;
    struct Node* next;

};

void prepend(struct Node** head, int newData){
    struct Node* newNode = new Node;
    newNode->data = newData;
    newNode->next = (*head);
    (*head) = newNode;

}

void print(struct Node* head){
    while(head!=NULL){
        cout << head->data <<" ";
        head = head->next;

    }

}
float addNode(Node* head){
    int counter = 0;
    int sum = 0;
    
    struct Node*curr = head;
    while(curr!=NULL){
        counter++;
        sum += curr->data;
        curr = curr->next;
    }

return sum;

    }

int main(){
    int data, input;
    Node* head = NULL;

    for (int i=0; i<5; i++){
        cout<< "Input data: \n";
        cin>> input;
        prepend(&head, input);
    }
    
    print(head);
    cout <<endl;
    addNode(head);
    print(head);


}

[finite star]

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[cosmic hamlet]

#include <iostream>

struct Node {
  int data;
  struct Node* next;
};

void prependAndRepoint(Node*& head, int newData) {
  Node* newNode = new Node;
  newNode->data = newData;
  newNode->next = head;
  head = newNode;
}

void print(Node* head) {
  while (head != NULL) {
    std::cout << head->data << " ";
    head = head->next;
  }
  std::cout << std::endl;
}

float sumNodes(Node* head) {
  int counter = 0;
  int sum = 0;

  Node* curr = head;
  while (curr != NULL) {
    counter++;
    sum += curr->data;
    curr = curr->next;
  }

  return sum;
}

int main() {
  int data, input;
  Node* head = NULL;

  for (int i = 0; i < 5; i++) {
    std::cout << "Input data: \n";
    std::cin >> input;
    prependAndRepoint(head, input);
  }

  print(head);
  std::cout << "Sum is " << sumNodes(head) << std::endl;
  print(head);
}

you're not printing what addNode(sumNode) is

passing by Node*& is easier to understand, you intend to modify the pointer