problem with void arrange();

#include <iostream>
using namespace std;
struct node
{
    int info;
    struct node *link;
} *start;

void createlist(int data);
void display();
void addtobeg(int data);
void addtoend(int data);
void addtopos(int data,int pos);
void finddata();
void arrange(){
        struct node *ptr,*temp;
        ptr = new node;
        ptr = start;

        bool change = true;

        while(change==true)
        {
        ptr = start;
            while(ptr->link!=NULL){
                ptr = ptr->link;
                if((ptr->info)>(ptr->link->info)){
                    temp = new node;
                    temp->info = ptr->info;
                    ptr->link->info = ptr->info;
                    ptr->info = temp->info;
                    delete temp;
                    change = true;

                }
                else
                    change = false;
            }
        }

        cout<<"\n\n--------------------Success---------------------\n\n";


}
void del();
void newline();

void delatpos(int pos);
int main()
{
    int choice, elem, i, num, addval,addvall, pos;
    start = NULL;
    restart:
    while (1) {

        system("cls");
        cout << "enter choice : \n1 - create link list \n2 - add at the beginning \n3 - add at the end \n4 - Add at certain position\n5 - Delete a value at position\n6 - delete at the end \n7 - find position of value\n8 - display \n9 - arrange values to ascending order\n20 - exit\n";
        cout<<"Choice: ";cin >> choice;cout<<endl;

        switch (choice)
        {
        case 1: cout << "Create link list \n";
            cout << "Enter the number of elements: \n";
            cin >> num;
            for (i = 0; i < num; i++)
            {
                cout << "Enter the elements \n";
                cin >> elem;
                createlist(elem);
            }
            break;
        case 2: if(start == NULL){
            cout<<"No link list created\nProgram will now exit.";
            system("pause");    exit(0);
            }
            else
            cout << "Add the beginning" << endl;
                cin >> addval;
                addtobeg(addval);
            break;
        case 3:if(start == NULL){
            cout<<"No link list created\nProgram will now exit.";
            system("pause");    exit(0);
            }
            else
            cout << "Add to the end" << endl;
            cin >> addval;
            addtoend(addval);
            break;
        case 4:if(start == NULL){
            cout<<"No link list created\nProgram will now exit.";
            system("pause");    exit(0);
            }
            else
            cout<<"Add at certain position\nNOTE: You can not add at the beginning. For that function please choose option [1] next time.\n";
            cout<<"Input value to be added: ";
            cin>>addvall;void newline();
            cout<<"Input position: ";
            cin>>pos;
            cout<<"Value : \""<<addvall<<"\""<<" will be added to the position: ["<<pos<<"]\n";
            system("pause"); addtopos(addvall,pos);
            break;
        case 5:if(start == NULL){
            cout<<"No link list created\nProgram will now exit.";
            system("pause");    exit(0);
            }
            else
            display();
            cout<<"\nDelete at position.\nInput position you want to delete: ";
            cin>>pos;

            delatpos(pos);
            break;
        case 6:if(start == NULL){
            cout<<"No link list created\nProgram will now exit.";
            system("pause");
                exit(0);
            }

            else
            del();
            break;

        case 7:
        finddata();
        break;
        case 8:
                if(start == NULL){
            cout<<"No link list created\nPlease make one first.";
            system("pause");
                goto restart;
            }
            else
            display();
            break;
        case 9:
            arrange();
            break;

        case 20:
            exit(0);

        default:
            cout<<"Choice not found\n";system("pause");
            goto restart;
        }
}
    system("pause>0");
    return 0;
}

void createlist(int data)
{
    struct node *tail, *ptr;
    ptr = new node;
    ptr->info = data;
    ptr->link = NULL;
    if (start == NULL)
        start = ptr;
    else
    {
        tail = start;
        while (tail->link != NULL)
            tail = tail->link;
        tail->link = ptr;
    }

}

void addtobeg(int data)
{
    struct node *ptr;
    ptr = new node;
    ptr->info = data;
    ptr->link = start;
    start = ptr;
}
void display()
{
    struct node * tail;
    tail = start;
    while (tail != NULL)
    {
        cout << tail->info << ", ";
        tail = tail->link;
    }
    system("pause>0");
}
void addtoend(int data)
{
    struct node *ptr, *m;
    ptr = new node;
    ptr->info = data;
    m = start;
    while (m->link != NULL)
    {
        m = m->link;
    }
    m->link = ptr;
    ptr->link = NULL;
}
void del() {//at the end only
    struct node *tail,*ptr,*tera;

     ptr = start;
    while (ptr->link->link != NULL)
    {
       ptr = ptr->link;
    }
    delete ptr->link;
    ptr->link = NULL;

}

void addtopos(int data,int pos){
    struct node *ptr,*temp, *temp2;
    ptr = new node;
    ptr->info = data;
    temp = start;
    temp2 = start;

    for(int i = 0; i<pos-2;i++)
    {
        temp = temp->link;
    }

    for(int i = 0;i<pos-1;i++)
    {
        temp2 = temp2->link;
    }

    temp->link = ptr;
    ptr->link = temp2;


}

void delatpos(int pos){
        struct node *temp, *ptr;
if (pos != 1){
    temp = start;
    ptr = start;

    for(int i = 0; i<pos-2;i++)
    {
        temp = temp->link;

    }
    for(int i = 0; i<pos;i++)
    {
        ptr = ptr->link;
    }


    delete temp->link;
    temp->link = ptr;
}

//1st value
    else if (pos == 1){
    ptr = start;
    temp = ptr->link;
    delete ptr;
    ptr = temp;
    start = ptr;
}
}

void finddata(){
    cout<<"Enter data you want to find: ";
    int i = 1, j;
//  d = &j;
    node *ptr, *d, *y;
    y = new node;
    cin>>y->info;
//  y->info = j;
    ptr = start;
    cout<<"The position[s] of the value you have entered are: ";
    while (ptr->link!=NULL){
        ptr = ptr->link;

        if(ptr->info == y->info){
            cout<<"["<<i+1<<"]"<<" ";

        }i++;
    }
    cout<<"\n";
    system("pause");
}

void newline()
{
    char s;
    do {
        cin.get(s);
    } while (s != '\n');
}