codeItDown-Data-Structure/12 may 2020 linked list at master · sdoshi983/codeItDown-Data-Structure · GitHub

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#include <iostream>
using namespace std;
struct node
{
    int data;
    node* next;
};
node *addnode(node *head,int val)
{
    node *newnode=new node;
    newnode->data=val;
    if(head==NULL)
    {
         newnode->next=NULL;
        return newnode;
    }
    newnode->next=head;
    return newnode;
}
void print(node* head){
    node *curr=head;
    while(curr!=NULL)
    {
        cout<<curr->data<<" ";
        curr=curr->next;
    }
}
node* addnodeatlast(node* head,int val)
{
    node *newnode=new node;
    newnode->data=val;
    newnode->next=NULL;
    if(head==NULL)
    {
        return newnode;
    }
    node* curr=head;
    while(curr->next!=NULL)
    {
        curr=curr->next;
    }
    curr->next=newnode;
    return head;
}

int main() {
    node* head=NULL;
    head=addnode(head,10);
    head=addnode(head,20);
    head=addnode(head,30);
    head=addnode(head,40);
    head=addnodeatlast(head,50);
    head=addnodeatlast(head,60);
    head=addnodeatlast(head,70);

    print(head);

    // cout<<head->data<<" ";
    // cout<<head->next->data<<" ";


}