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sgLLadd_bef.cpp
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98 lines (93 loc) · 1.33 KB
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#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<iostream>
#define null 0
using namespace std;
struct node
{
int data;
node *next;
};
node *first,*temp,*ttemp,*p,*q,*r,*ptemp,*pttemp,
*ntemp,*nttemp;
void init()
{
first=temp=ttemp=null;
}
void addnode(int val)
{
temp=first;
while(temp->next!=null)
{
temp=temp->next;
}
ttemp=new node;
ttemp->data=val;
ttemp->next=null;
temp->next=ttemp;
}
void createfirst(int val)
{
first=new node;
first->data=val;
first->next=null;
}
void disp()
{
temp=first;
while(temp!=null)
{
cout<<temp->data<<endl;
temp=temp->next;
}
}
void add_before_first()
{
temp = new node;
cin>>temp->data;
temp->next=first;
first=temp;
}
void add_before_given(int x,int y)
{
temp=first;
while(temp->data!=x)
{
ttemp=temp;
temp=temp->next;
}
p=new node;
cin>>p->data;
p->next=temp;
ttemp->next=p;
}
void add_before_last()
{
temp=first;
while(temp->next!=null)
{
ttemp=temp;
temp=temp->next;
}
q=new node;
cin>>q->data;
q->next=temp;
ttemp->next=q;
}
int main()
{
init();
createfirst(10);
addnode(20);
addnode(30);
addnode(50);
addnode(60);
disp();
add_before_first();
disp();
add_before_given(30,90);
disp();
add_before_last();
disp();
}