DSL C19

 Department of Computer Engineering has student's club named 'Pinnacle Club'. Students of second, third and final year of department can be granted membership on request. Similarly one may cancel the membership of club. First node is reserved for president of club and last node is reserved for secretary of club. Write C++ program to maintain club member‘s information using singly linked list. Store student PRN and Name. Write functions to: a) Add and delete the members as well as president or even secretary. b) Compute total number of members of club c) Display members d) Two linked lists exists for two divisions. Concatenate two lists.

 #include<iostream>  
   
 using namespace std;  
   
 struct node{  
        
      int PRN;  
      char Name[10];  
      node *next;  
 };  
   
 node *nnode,*npre;  
 char ch;  
 int prn,total=0,choice;  
   
 class PinClub{  
        
      public:  
             
           node *President,*Secretary;  
             
           PinClub(){  
             
           President=Secretary=NULL;  
      }  
        
      void create();  
      void display();  
      void newpresident();  
      void DelPre();  
      void DelSec();  
      void DelMem();  
      void Total();  
 };  
   
 void PinClub::create()  
 {  
      do{  
           nnode=new node;  
           nnode->next=NULL;  
           cout<<"Enter PRN NO. of Student : "<<endl;  
           cin>>nnode->PRN;  
           cout<<"Enter Name of Student : "<<endl;  
           cin>>nnode->Name;  
             
           if (President==NULL || Secretary==NULL)  
           {  
           President=Secretary=nnode;  
           }  
           else  
           {  
           Secretary->next=nnode;  
           Secretary=nnode;  
           }  
           cout<<"Do you want to Add more Students to Club (y or n) ";  
           cin>>ch;  
      }while(ch=='y');       
 }  
   
   
 void PinClub::display()  
 {    
   cout<<"<><><><><> List of Members in Club <><><><><>"<<endl;  
   cout<<"PRN NO."<<" "<<"Name"<<endl;  
   node *temp;  
   temp=President;  
   while(temp!=NULL)  
      {  
      cout<<" "<<temp->PRN<<"   ";  
      cout<<temp->Name<<endl;  
      temp=temp->next;  
  }  
 }  
   
 void PinClub::newpresident()  
 {   
   npre=new node;  
   npre->next=NULL;  
   cout<<"Enter PRN NO. of New President : "<<endl;  
   cin>>npre->PRN;  
   cout<<"Enter Name of New President : "<<endl;  
   cin>>npre->Name;  
   npre->next=President;  
   President=npre;  
   cout<<"Name of New President : "<<President->Name<<endl;  
   cout<<"PRN NO. of New President : "<<President->PRN<<endl;  
 }  
   
 void PinClub::DelPre()  
 {  
      node *temp;  
      temp=President;  
      President=President->next;  
      delete temp;  
      cout<<"Name of New President : "<<President->Name<<endl;  
      cout<<"PRN NO. of New President : "<<President->PRN<<endl;  
 }  
   
 void PinClub::DelSec()  
 {  
      node *temp;  
      temp=President;  
      while(temp->next!=Secretary){  
      temp=temp->next;  
      }  
   Secretary=temp;  
   delete temp->next;  
   cout<<"Name of New Secretary : "<<Secretary->Name<<endl;  
   cout<<"PRN NO. of New Secretary : "<<Secretary->PRN<<endl;  
 }  
   
 void PinClub::DelMem()  
 {  
      cout<<"Enter PRN no. Member to be deleted"<<endl;  
      cin>>prn;  
      node *temp,*temp1;  
      temp=President;  
      while((temp->next)->PRN!=prn){  
      temp=temp->next;  
      }  
      temp1=temp->next;  
      temp->next=temp1->next;  
       delete temp1;  
 }  
   
 void PinClub::Total()  
 {  
   node *temp;  
   temp=President;  
   while(temp!=NULL)  
      {  
           total=total+1;  
           temp=temp->next;       
      }  
      cout<<"Total No. of Elements Are :"<<total<<endl;  
 }  
   
   
 int main(){  
        
      PinClub M1,M2;  
      M1.create();  
      M1.display();  
        
      cout<<"\nPresident Name : "<<M1.President->Name<<endl;  
      cout<<"Secretary Name : "<<M1.Secretary->Name<<endl;  
        
   do  
      {  
   cout<<"\n1.Insert New President\n2.Delete President\n3.Delete Secretary\n4.Delete Member\n5.Display\n6.Find total No. of members\n7.Concatenate two list\n0. Exit";  
   cout<<"\nEnter your choice: ";  
   cin>>choice;  
   switch(choice)  
           {  
                case 0:   
                     break;   
                case 1:   
                  M1.newpresident();  
                     break;  
                case 2:       
                  M1.DelPre();  
                     break;  
                case 3:   
                  M1.DelSec();  
                     break;  
                case 4:   
                  M1.DelMem();  
                     break;  
                case 5:   
                  M1.display();  
                  break;  
                case 6:  
                     M1.Total();  
                     break;  
                case 7:  
                     cout<<"Enter the Details of new Club"<<endl;  
                     M2.create();  
                     M2.display();  
                     M1.Secretary->next=M2.President;  
                     M1.Secretary=M2.Secretary;  
                     M1.display();  
                     break;  
                default:  
                     cout<<"Wrong choice";  
           }  
      }while(choice!=0);  
      return 0;  
 }