Small code linked list realization Lights out Game 2

/*cout <<  " *****************game by  ring light********************* " << endl;    cout << "  ****  a full-cycle series lamp chain     for saving resources wait for your turn off the light action ****** " << endl;    cout <<   " ***** tip:  when a lamp is selected, the lamp and the lamp state next to it will change."  << endl;    cout  <<  " *****************game by  ring light**************************"  << endl;     the solution is simply to switch from the first point of all the lights can be achieved all the lights from full-light to all-out */   #include  <iostream>using namespace std;struct node{int data;node *prev;node * Next;public:node ():d ATA (1), prev (null), Next (null) {}node (int a):d ATA (a), prev (null), Next (null) {}}; void  creat (node *list) {int n=20;node *tmp;node *tail;while (n--) {if (list->next ==  null) {TMP&NBSP;&NBsp;= new node (1); tmp->prev = list;tmp->next = list;list->prev =  tmp;list->next = tmp;tail=tmp;} Else{tmp = new node (1); list->next->prev = tmp;tmp->next = list- >next;tmp->prev = tail;tail->next=tmp;list->next = tmp;}}} Void show (node *list) {int n=20;node *p = list->next;while (n--) {//cout<< "[" <<20-n<< "] " <<p->data<< " ";cout<<p->data<< " ";p =p- >next;}     cout<<endl;} Void _play (node *list,int x) {         node *p  = list->next;    while (x-- -1)     {         p=p->next;    }    p->prev- >data=1-p->prev->data;    p->data=1-p->data;    p->next->data=1-p->next->data;      }int check (node *list) {     int n=20;node *p  = list->next;while (n--) {     if (p->data==1) Break; p=p->next;}      return 1-p->data;} Void play (node *list) {         int x=1;        int n=40;      while (n--)        {                    cout<< "40 Steps to solve Riddles" <<40-n<< "Step: (Input 0~20)" <<endl<< ' \ t ' << ' t ';          cin>>x;          _play (list,x);      &nbsP; show (list);        if (N==20&&check (list)) break;       }}int main () {          cout  <<  " *****************game by  ring light**************************"  << endl;    cout <<  " ****  a full cycle series lamp chain      waiting for you to save resources to turn off the light action ****** " << endl;    cout << "  ***** tip:  When a lamp is selected, the lights and the lights on the side will change. * * *  << endl;    cout  <<  " *****************game by  ring light**************************"   << endl;    node list;creat (&list),  show (&list);p Lay (& list), show (&list);cout <<  " wzzx"  << endl;return 0;}

Small code linked list realization Lights out Game 2