linked list create,insert&visualize

#include <stdio.h>
#include <stdlib.h>
struct node
{
    int data;
    node* next;
}*head;
void create_node(int n);
void display_node();
int main()
{
    int n;
    printf("Please enter an positive integer for the number of node\n");
    scanf("%d",&n);
    create_node(n);
    display_node();
    return 0;
}
void create_node(int n)
{
    int value,i;
    struct node *current,*temp;
    head=(struct node*)(malloc(sizeof(node)));
    printf("Please enter value for node : 1\n");
    scanf("%d",&value);
    head->data=value;
    head->next= nullptr;
    temp=head;
    for(i=2;i<=n;i++)
    {
        current=(struct node*)(malloc(sizeof(node)));
        printf("Please enter value for node : %d\n",i);
        scanf("%d",&value);
        current->data=value;
        current->next= nullptr;
        temp->next=current;
        temp=temp->next;
    }
}
void display_node()
{
    struct node *temp;
    temp=head;
    while (temp!= nullptr)
    {
        printf("%d\t",temp->data);
        temp=temp->next;
    }
}