3_Book.cpp

#include <iostream>
#include <string.h>
using namespace std;
struct node
{
     char name[20];
     node *next;
     node *down;
     int flag;
};
class Gll
{
     char ch[20];
     int n, i;
     node *head = NULL, *temp = NULL, *t1 = NULL, *t2 = NULL;

public:
     node *create();
     void insertb();
     void insertc();
     void inserts();
     void insertss();
     void displayb();
};
node *Gll::create()
{
     node *p = new node;
     p->next = NULL;
     p->down = NULL;
     p->flag = 0;
     cout << "\n enter the name";
     cin >> p->name;
     return p;
}
void Gll::insertb()
{

     if (head == NULL)
     {
          t1 = create();
          head = t1;
     }
     else
     {
          cout << "\n book exist";
     }
}
void Gll::insertc()
{
     if (head == NULL)
     {
          cout << "\n there is no book";
     }
     else
     {
          cout << "\n how many chapters you want to insert";
          cin >> n;
          for (i = 0; i < n; i++)
          {
               t1 = create();
               if (head->flag == 0)
               {
                    head->down = t1;
                    head->flag = 1;
               }
               else
               {
                    temp = head;
                    temp = temp->down;
                    while (temp->next != NULL)
                         temp = temp->next;
                    temp->next = t1;
               }
          }
     }
}
void Gll::inserts()
{

     if (head == NULL)
     {
          cout << "\n there is no book";
     }
     else
     {
          cout << "\n Enter the name of chapter on which  you want to enter the section";
          cin >> ch;

          temp = head;
          if (temp->flag == 0)
          {
               cout << "\n their are no chapters on in book";
          }
          else
          {
               temp = temp->down;
               while (temp != NULL)
               {
                    if (!strcmp(ch, temp->name))
                    {
                         cout << "\n how many sections you want to enter";
                         cin >> n;
                         for (i = 0; i < n; i++)
                         {

                              t1 = create();
                              if (temp->flag == 0)
                              {
                                   temp->down = t1;

                                   temp->flag = 1;
                                   cout << "\n******";
                                   t2 = temp->down;
                              }
                              else
                              {
                                   cout << "\n#####";
                                   while (t2->next != NULL)
                                   {
                                        t2 = t2->next;
                                   }
                                   t2->next = t1;
                              }
                         }
                         break;
                    }
                    temp = temp->next;
               }
          }
     }
}
// void Gll::insertss()
// {

//      if (head == NULL)
//      {
//           cout << "\n there is no book";
//      }
//      else
//      {
//           cout << "\n Enter the name of chapter on which  you want to enter the section";
//           cin >> ch;

//           temp = head;
//           if (temp->flag == 0)
//           {
//                cout << "\n their are no chapters on in book";
//           }
//           else
//           {
//                temp = temp->down;
//                while (temp != NULL)
//                {
//                     if (!strcmp(ch, temp->name))
//                     {
//                          cout << "\n enter name of section in which you want to enter the sub section";
//                          cin >> ch;

//                          if (temp->flag == 0)
//                          {
//                               cout << "\n their are no sections ";
//                          }
//                          else
//                          {
//                               temp = temp->down;
//                               while (temp != NULL)
//                               {
//                                    if (!strcmp(ch, temp->name))
//                                    {
//                                         cout << "\n how many subsections you want to enter";
//                                         cin >> n;
//                                         for (i = 0; i < n; i++)
//                                         {

//                                              t1 = create();
//                                              if (temp->flag == 0)
//                                              {
//                                                   temp->down = t1;

//                                                   temp->flag = 1;
//                                                   cout << "\n******";
//                                                   t2 = temp->down;
//                                              }
//                                              else
//                                              {
//                                                   cout << "\n#####";
//                                                   while (t2->next != NULL)
//                                                   {
//                                                        t2 = t2->next;
//                                                   }
//                                                   t2->next = t1;
//                                              }
//                                         }
//                                         break;
//                                    }
//                                    temp = temp->next;
//                               }
//                          }
//                     }

//                     temp = temp->next;
//                }
//           }
//      }
// }

void Gll :: insertss()
{
     if(head==NULL)
     {
          cout<<"Book is empyt";
     }
     else 
     {
          cout<<"Enter the name of chapter in which you want to insert"<<endl;
          cin>>ch;
          temp=head;
          if(temp->flag==0)
          {
               cout<<"No chpts";
          }
          else{
               temp=temp->down;
               while(temp!=NULL)
               {
                    if(!strcmp(ch,temp->name))
                    {
                         cout<<"Enter the name of the section in which you want to insert"<<endl;
                         cin>>ch;
                         if(temp->flag==0)
                         {
                              cout<<"No sections";
                         }
                         else
                         {
                              temp=temp->down;
                              while(temp!=NULL)
                              {
                                   if(!strcmp(ch,temp->name))
                                   {
                                        cout<<"No of subsections"<<endl;
                                        cin>>n;
                                        for(int i=0;i<n;i++)
                                        {
                                             t1=create();
                                             if(temp->down==NULL)
                                             {
                                                  temp->down=t1;
                                                  temp->flag=1;
                                                  t2=temp->down;
                                             }
                                             else{
                                                  while(t2->next!=NULL)
                                                  {
                                                       t2=t2->next;
                                                  }
                                                  t2->next=t1;
                                             }
                                        }
                                        break;
                                   }
                                   temp=temp->next;
                              }

                         }
                    }
                    temp=temp->next;

               }
          }
     }
}
void Gll::displayb()
{

     if (head == NULL)
     {
          cout << "\n book not exist";
     }
     else
     {
          temp = head;

          cout << "\n NAME OF BOOK:  " << temp->name;
          if (temp->flag == 1)
          {
               temp = temp->down;

               while (temp != NULL)
               {
                    cout << "\n\t\tNAME OF CHAPTER:  " << temp->name;
                    t1 = temp;
                    if (t1->flag == 1)
                    {
                         t1 = t1->down;
                         while (t1 != NULL)
                         {
                              cout << "\n\t\t\t\tNAME OF SECTION:  " << t1->name;
                              t2 = t1;
                              if (t2->flag == 1)
                              {
                                   t2 = t2->down;
                                   while (t2 != NULL)
                                   {
                                        cout << "\n\t\t\t\t\t\tNAME OF SUBSECTION:  " << t2->name;
                                        t2 = t2->next;
                                   }
                              }
                              t1 = t1->next;
                         }
                    }
                    temp = temp->next;
               }
          }
     }
}
int main()
{
     Gll g;
     int x;
     while (1)
     {
          cout << "\n\n enter your choice";
          cout << "\n 1.insert book";
          cout << "\n 2.insert chapter";
          cout << "\n 3.insert section";
          cout << "\n 4.insert subsection";
          cout << "\n 5.display book";
          cout << "\n 6.exit";
          cin >> x;
          switch (x)
          {
          case 1:
               g.insertb();
               break;
          case 2:
               g.insertc();
               break;
          case 3:
               g.inserts();
               break;
          case 4:
               g.insertss();
               break;
          case 5:
               g.displayb();
               break;
          case 6:
               exit(0);
          }
     }
     return 0;
}