In this program we will insert,delete and print data of linked list
//Program Starts
#include<iostream>
#include<conio.h>
using
namespace std;
struct
node{
int data;
node *next;
};
class
linked{
private:
node
*ptr,*head,*tail,*cur,*prev;
int d,loc;
public:
void create();
void insatbeg();
void insatend();
void insatspec();
void delatbeg();
void delatend();
void delatspecind();
void delofspecdat();
void show();
};
void
linked::create()
{
head=new node;
head->data=0;
head -> next=NULL;
tail=head;
for(int i=1;i<10;i++)
{
ptr= new node;
ptr->data=i;
ptr->next=NULL;
tail->next=ptr;
tail=ptr;
}
}
void
linked::insatbeg()
{
cout<<"Enter data at
begining : ";
cin>>d;
ptr= new node;
ptr->data=d;
ptr->next=head;
head=ptr;
}
void
linked::insatend()
{
cout<<"Enter data at end :
";
cin>>d;
ptr= new node;
ptr->data=d;
ptr->next=NULL;
cur=head;
while(cur->next!=NULL)
{
cur=cur->next;
}
cur->next=ptr;
}
void
linked::insatspec()
{
cout<<"Enter Location :
";
cin>>loc;
cout<<"Enter data: ";
cin>>d;
ptr= new node;
ptr->data=d;
prev=head;
cur=head->next;
for(int i=1;i<=loc-2;i++)
{
prev= cur;
cur=cur->next;
}
prev->next=ptr;
ptr->next=cur;
}
void
linked::delatbeg()
{
cur = head;
head=head->next;
delete cur;
}
void
linked::delatend()
{
prev=head;
cur=head->next;
while(cur->next!=NULL)
{
prev=cur;
cur=cur->next;
}
prev->next=NULL;
delete cur;
}
void
linked::delatspecind()
{
cout<<"Enter location to be
deleted : ";
cin>>loc;
prev=head;
cur=head->next;
for(int i=1;i<=loc-2;i++)
{
prev=cur;
cur=cur->next;
}
prev->next=cur->next;
delete cur;
}
void
linked::delofspecdat()
{
cout<<"Enter data to be
deleted : ";
cin>>d;
prev=head;
cur=head->next;
while(cur->data!=d)
{
prev=cur;
cur=cur->next;
}
prev->next=cur->next;
delete cur;
}
void
linked::show()
{
cur=head;
while(cur!=NULL)
{
cout<<cur->data<<" -> ";
cur=cur->next;
}
}
int
main()
{
linked l1;
int c;
l1.create();
do{
cout<<"\n\nPress 1 to
insert at beg\nPress 2 to insert at end\nPress 3 to insert at specific
location\nPress 4 to show\nPress 5 to delete data from begining\nPress 6 to
delete data from End\nPress7 to delete data from specific location\nPress 8 to
delete specific data\nPress 9 to exit\n Value==== ";
cin>>c;
switch(c)
{
case 1:
l1.insatbeg();
break;
case 2:
l1.insatend();
break;
case 3:
l1.insatspec();
break;
case 4:
l1.show();
break;
case 5:
l1.delatbeg();
break;
case 6:
l1.delatend();
break;
case 7:
l1.delatspecind();
break;
case 8:
l1.delofspecdat();
break;
case 9:
return
1;
}
}
while(1);
}
OUTPUT:
