链表c ++，预期主表达式在->之前

Question

im trying to learn linked lists in c++; my code look like this

#include <iostream>
#include <string>

using namespace std;
struct node{

    int number;
    node *next;

};

struct zoznam{

    node *head=NULL;
    node *tail=NULL;

};

void insertAsFirst(node *&head,node *&last, int number){

    node *tmp = new node;
    tmp->number = number;
    tmp->next=NULL;
    head=tmp;
    last=tmp;

}
void insertValues( node *&head , node *&last, int number){

    if(head==NULL){
        insertAsFirst(zoznam->head,zoznam->tail,number);
    }else{

        node *tmp = new node;
        tmp->number=number;
        tmp->next=NULL;
        last->next=tmp;
        //last=tmp;


    }
}
int main()
{
    for( int i = 0; i < 10; i++){
        insertValues(zoznam->head,zoznam->tail,i);
    }
    node *current=zoznam->head;
    while(current!=NULL){
        cin<<current->number << endl;
        current=current->next;
    }
    return 0;
}

expected primary-expression before '->' token|

Being new to c++ , i have no idea what the error means , how can i fix that , i tried to check it up but found nothing. Thanks

Answer 1

As you're new to C++, I am giving you some details.

When you are using struct I mean you define any struct then it becomes a type name not a variable. To use that you need to declare variable(s) of that type.

Here, in the main , you're using zoznam , which is a type name and the definition of that type is the definition of the struct .

Declaration: zoznam var_name;

Use: var_name.head; or ' var_name.tail ;'.

Learn more about struct and pointer . Read the documentations carefully not only the example codes in this two link.