C++. Односвязный список. Уничтожить список

[Olya90]

Посмотрите че не так??:

#include <iostream>
using namespace std;

struct list{
    int key;
    list *next;
};

void createList(list* &desc)
{
    list* x;
    int n;

    cout << "Enter list size >0" << endl;
    cin >> n;
    x = new list;
    desc = x;
    x -> key = rand() % 50;
    for( int i = 1; i <= n; i++)
    {
        if ( i != n )
        {
        //cout<<x ->key<< "  ";
        x -> next = new list;
        x -> next = x;
        x = x -> next;
        x -> key = rand() % 50;
        
        } else
            x -> next = NULL;
    }


}

void showList(list* d)
{
    list* x;
    x = d;
    while ( x != NULL )
    {
        cout << x -> key << "   ";
        x = x -> next;
    }
    
    cout << endl;
}



void delList(list* &d)
{
    list *x, *t;
    x = d;
    t = d; 
    while ( x ->next != NULL )
    {
        t = x -> next;
        delete x;
        x = t;
    }
}


int main()
{
    list *desc;
    createList( desc );
    showList( desc );
    delList( desc );
    showList( desc );

    system("pause");
    return 0;
}

[Sazary]

Тут:

        if ( i != n )
        {
        //cout<<x ->key<< "  ";
        x -> next = new list;
        x -> next = x;  // <-- что это?
        x = x -> next;
        x -> key = rand() % 50;
        
        } else

и в dellist:

 while ( x ->next != NULL )

Почему x->next? Нужно просто x.

#include <iostream>
#include <conio.h>
using namespace std;

struct list{
    int key;
    list *next;
};

void createList(list* &desc)
{
    list* x;
    int n;

    cout << "Enter list size >0" << endl;
    cin >> n;
    x = new list;
    desc = x;
    x -> key = rand() % 50;
    for( int i = 1; i <= n; i++)
    {
        if ( i != n )
        {
        //cout<<x ->key<< "  ";
        x -> next = new list;
        x = x -> next;
        x -> key = rand() % 50;

        } else
            x -> next = NULL;
    }


}

void showList(list* d)
{
    list* x;
    x = d;
    while ( x != NULL )
    {
        cout << x -> key << "   ";
        x = x -> next;
    }

    cout << endl;
}



void delList(list* &d)
{
    list *x, *t;
    x = d;
    t = d;
    while ( x != NULL )
    {
        t = x -> next;
        delete x;
        x = t;
    }
d = NULL;
}


int main()
{
    list *desc;
    createList( desc );
    showList( desc );
    delList( desc );
    showList( desc );

    system("pause");
    return 0;
}

[Olya90]

спасибо!!!!!