data structure lab progrms
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8/8/2019 Data structure Lab progrms
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 1
Ex.No:1
MOVING NODES IN A LINKED LIST
AI M:
Write a program such that there is a function “move” which moves a node forward by
n positions in a linked list.
PROGRAM:
# include<stdio.h>
# include<conio.h>
# include "malloc.h"
struct node
{
int data;
struct node *link;
};
void add(struct node **,int );
void display(struct node *);
void move(struct node **,int,int);
int count(struct node *);
void main()
{
int num,n,i,elem,posi;
struct node *ptr,*temp;
ptr=NULL;
clrscr();
printf("MOVE operation in Link list\n");
printf("---------------------------");
printf("\n");
printf("Enter no of elements:");
scanf("%d",&n);
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 2
for(i=1;i<=n;i++)
{
printf("Enter the element you want to add: ");
scanf("%d",&num);
add(&ptr,num);
display(ptr);
printf("\n");
}
printf("Element to be moved:\n");
scanf("%d",&elem);
printf("Number of position to be moved forwardly:\n");
scanf("%d",&posi);
move(&ptr,elem,posi);
printf("\nList after MOVE operation:\n");
display(ptr);
getch();
}
void add(struct node **q,int num)
{
struct node *temp;
temp = *q;
if(*q==NULL)
{
*q=malloc(sizeof(struct node));
temp = *q;
}
else
{
while((temp->link)!=NULL)
{
temp=temp->link;
}
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 3
temp->link = malloc(sizeof(struct node));
temp=temp->link;
}
temp->data = num;
temp->link = NULL;
}
void display(struct node *pt)
{
printf("%d",pt->data);
pt=pt->link;
while(pt!=NULL)
{
printf("--> %d",pt->data);
pt=pt->link;
}
}
void move(struct node ** pt,int elem,int posi)
{
int pos=1,n=1,last;
struct node * temp,* temp1,*prev;
temp=*pt;
temp1=*pt;
while(temp->data!=elem)
{
prev=temp;
temp=temp->link;
++n;
}
while(pos!=(n-posi-1))
{
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 4
temp1=temp1->link;
++pos;
}
if((n-posi-1)==0)
{
prev->link=temp->link;
temp->link=*pt;
*pt=temp;
}
else
{
prev->link=temp->link;
temp->link=temp1->link;
temp1->link=temp;
}
}
int count(struct node * p)
{
int c=0;
while(p!=NULL)
{
p=p->link;
c++;
}
return c;
}
Output:
MOVE operation in Link list
-----------------------------------
Enter the number of elements : 6
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 5
Enter the element you want to add: 1
1
Enter the element you want to add: 4
1--> 4
Enter the element you want to add: 2
1--> 4--> 2
Enter the element you want to add: 6
1--> 4--> 2--> 6
Enter the element you want to add: 7
1--> 4--> 2--> 6--> 7
Enter the element you want to add: 3
1--> 4--> 2--> 6--> 7--> 3
Element to be moved:
7
Number of position to be moved forwardly:
3
List after MOVE operation:
1--> 7--> 4--> 2--> 6--> 3
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 6
Ex.No:2
GENERATE DOUBLY LINKED LIST FROM SINGLY LINKED LIST
AI M:
Write a program to generate a doubly linked list from it‟s singly linked list
representation.
PROGRAM:
#include<stdio.h>
#include<conio.h>
#include"malloc.h"
struct node
{
int data;
struct node *prev,*link;
};
struct node1
{
int data;
struct node1 *link;
};
void add(struct node1 **,int);
void display(struct node *);
void generate(struct node **pt,struct node1 **pt1);
void display1(struct node1 *);
void main()
{
int num,n,i,elem,posi;
struct node *ptr,*temp;
struct node1 *ptr1;
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 7
ptr=NULL;
ptr1=NULL;
clrscr();
printf("Generation of Double link list from Single link list\n");
printf("----------------------------------------------------\n");
printf("\n");
printf("Enter the number of elements you want to insert in SINGLE link list:");
scanf("%d",&n);
printf("\n");
for(i=1;i<=n;i++)
{
printf("Enter the element you want to add:");
scanf("%d",&num);
add(&ptr1,num);
display1(ptr1);
printf("\n");
}
generate(&ptr,&ptr1);
printf("\nAfter conversion from SINGLE to DOUBLE:\n");
printf("\n");
display(ptr);
getch();
}
void add(struct node1 ** pt,int num)
{
struct node1 *temp,*current,*previous;
current=malloc(sizeof(struct node));
current->data=num;
current->link=NULL;
temp=*pt;
if(temp==NULL)
{
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 8
*pt=current;
}
else
{
while(temp->link!=NULL)
{
temp=temp->link;
}
temp->link=current;
}
}
void display(struct node *pt)
{
printf("%d",pt->data);
pt=pt->link;
while(pt!=NULL)
{
printf("<--> %d",pt->data);
pt=pt->link;
}
}
void display1(struct node1 *pt)
{
printf("%d",pt->data);
pt=pt->link;
while(pt!=NULL)
{
printf("--> %d",pt->data);
pt=pt->link;
}
}
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 9
void generate(struct node **pt,struct node1 **pt1)
{
int ele;
struct node *temp,*current;
struct node1 *temp1;
current=malloc(sizeof(struct node1));
current->link=NULL;
current->prev=NULL;
temp=*pt;
temp1=*pt1;
if(*pt1==NULL)
{
printf("Empty ");
}
else
{
ele=temp1->data;
current->data=ele;
temp=current;
temp1=temp1->link;
*pt=temp;
while(temp1)
{
ele=temp1->data;
temp->link=malloc(sizeof(struct node));
temp->link->prev=temp;
temp=temp->link;
temp->data=ele;
temp->link=NULL;
temp1=temp1->link;
}
}
}
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 10
Output:
Generation of Double link list from Single link list
-------------------------------------------------------------
Enter the number of elements you want to insert in SINGLE link list:5
Enter the element you want to add:34
34
Enter the element you want to add:56
34--> 56
Enter the element you want to add:11
34--> 56--> 11
Enter the element you want to add:75
34--> 56--> 11--> 75
Enter the element you want to add:22
34--> 56--> 11--> 75--> 22
After conversion from SINGLE to DOUBLE:
34<--> 56<--> 11<--> 75<--> 22
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 11
Ex.No:3
SEARCHING IN BST
AI M:
Write a program to search for an element using the BST.
PROGRAM:
#include<stdio.h>
#include<conio.h>
#include<alloc.h>
struct bnode
{
int data;
struct bnode *lchild,*rchild;
};
void insert(struct bnode **,int);
void search(struct bnode **,int);
void inorder(struct bnode *);
void main()
{
int i,will,num,n;
struct bnode *root;
root=NULL;
clrscr();
will=1;
printf("\nElement search in BST");
printf("\n---------------------");
printf("\n");
printf("Enter the number of nodes in BST: ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
printf(" Enter the element you want to add: ");
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Roll No: 09MA01 Page 12
scanf("%d",&num);
insert(&root,num);
printf("\n");
}
printf("Nodes displayed in INORDER:\n");
inorder(root);
while(will)
{
printf("\nEnter the element you wants to find: ");
scanf("%d",&num);
search(&root,num);
printf("\n");
printf("\nDO you want to continue (press 1 for YES or 0 for quit):");
scanf("%d",&will);
}
getch();
}
void insert(struct bnode ** rt,int ele)
{
struct bnode *temp,*current;
current=malloc(sizeof(struct bnode));
current->data=ele;
current->lchild=NULL;
current->rchild=NULL;
temp=*rt;
if(*rt==NULL)
{
*rt=current;
}
else
{
while(temp!=NULL)
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{
if(temp->data<ele)
{
if(temp->rchild==NULL)
{
temp->rchild=current;
temp=NULL;
}
else
{
temp=temp->rchild;
}
}
else
{
if(temp->lchild==NULL)
{
temp->lchild=current;
temp=NULL;
}
else
{
temp=temp->lchild;
}
}
}
}
}
void search(struct bnode **pt,int ele)
{
int flag=1;
struct bnode *temp,*prev;
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temp=*pt;
while(temp!=NULL)
{
if(temp->data==ele)
{
if(temp==*pt)
{
printf("Element %d is found at root ",ele);
temp=NULL;
flag=0;
}
else
{
printf("\nElement %d is found\n",ele);
printf("\nParent e lement is:%d",prev->data);
temp=NULL;
flag=0;
}
}
else if(temp->data>ele)
{
prev=temp;
temp=temp->lchild;
}
else if(temp->data<ele)
{
prev=temp;
temp=temp->rchild;
}
}
if(flag==1)
{
printf("\nElement is not found");
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 15
}
return;
}
void inorder(struct bnode *rt)
{
if(rt!=NULL)
{
inorder(rt->lchild);
printf("\t%d",rt->data);
inorder(rt->rchild);
}
else
return;
}
Output:
Element search in BST
----------------------------
Enter the number of nodes in BST: 6
Enter the element you want to add: 5
Enter the element you want to add: 4
Enter the element you want to add: 6
Enter the element you want to add: 2
Enter the element you want to add: 7
Enter the element you want to add: 8
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 16
Nodes displayed in INORDER:
2 4 5 6 7 8
Enter the element you wants to find: 4
Element 4 is found
Parent element is: 5
DO you want to continue (press 1 for YES or 0 for quit):1
Enter the element you wants to find: 5
Element 5 is found at Root
DO you want to continue (press 1 for YES or 0 for quit):1
Enter the element you wants to find: 16
Sorry the element 16 was not found
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 17
Ex.No:4
INSERTION SORT USING LINKED LISTS
AI M:
Write a program to implement insertion sort using linked lists.
PROGRAM:
# include<stdio.h>
# include<conio.h>
# include "malloc.h"
struct node
{
int data;
struct node *link;
};
void add(struct node **,int );
void display(struct node *);
void main()
{
int will,num;
clrscr();
struct node *ptr,*temp;
ptr=NULL;
will=1;
printf("Insertion Sort using link list\n");
printf("------------------------------");
printf("\n");
while(will==1)
{
printf(" Enter the element you want to add: ");
scanf("%d",&num);
add(&ptr,num);
display(ptr);
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Name : A. Arul Jefferson
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printf("\nDo you want to continue ( press 1 for YES or 0 for quit):");
scanf("%d",&will);
}
getch();
}
void add(struct node **q,int num)
{
struct node *temp,*prev,*current;
current=malloc(sizeof(struct node));
current->data=num;
current->link=NULL;
temp = *q;
if(*q==NULL)
{
*q=current;
temp = *q;
}
else
{
if(temp->data>num)
{
if(temp->link!=NULL)
{
current->link=temp;
*q=current;
}
else{
current->link=temp;
*q=current;
temp->link=NULL;
}
}
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 19
else
{
while((temp->link)!=NULL&&temp->data<num)
{
prev=temp;
temp=temp->link;
}
if(temp->link==NULL)
{
if(temp->data<num){
temp->link = current;
current->link=NULL;
}
else
{
current->link=temp;
prev->link=current;
}
}
else
{
current->link=temp;
prev->link=current;
}
}
}
}
void display(struct node *pt)
{
printf("%d",pt->data);
pt=pt->link;
while(pt!=NULL)
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Roll No: 09MA01 Page 20
{
printf("--> %d",pt->data);
pt=pt->link;
}
}
Output:
Insertion Sort using link list
---------------------------------
Enter the element you want to add: 5
5
Do you want to continue ( press 1 for YES or 0 for quit):1
Enter the element you want to add: 3
3--> 5
Do you want to continue ( press 1 for YES or 0 for quit):1
Enter the element you want to add: 2
2--> 3--> 5
Do you want to continue ( press 1 for YES or 0 for quit):1
Enter the element you want to add: 7
2--> 3--> 5--> 7
Do you want to continue ( press 1 for YES or 0 for quit):1
Enter the element you want to add: 6
2--> 3--> 5--> 6--> 7
Do you want to continue ( press 1 for YES or 0 for quit):1
Enter the element you want to add: 1
1--> 2--> 3--> 5--> 6--> 7
Do you want to continue ( press 1 for YES or 0 for quit):0
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 21
Ex.No:5
MANIPULATION IN A BINARY TREE
AI M:
Write a program to do the following on a binary tree
i. Count the number of nodes in the tree
ii. Sum the contents of the nodes
PROGRAM:
#include <stdio.h>
#include <conio.h>
#include <malloc.h>
#include <math.h>
int count(int *a, int n1);
int sum(int *a,int n1);
void insert( int *a ,int ele,int pos);
void main()
{
int n,i,n1,pos,ele;
clrscr();
printf(" Manipulation in Binary Tree");
printf("\n------------------------");
printf("\n");
printf(" \nEnter the number of nodes in binary tree: ");
scanf(" %d",&n);
n1= pow(2,n)-1;
printf("\nThe maximum number of possible positions: %d\n",n1);
int *a = (int *) malloc (n1 * sizeof(int));
for( i=0;i<n1;i++)
{
a[i]=0;
}
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Name : A. Arul Jefferson
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for( i=0;i<n;i++)
{
printf("\nNodes position:");
scanf(" %d",&pos);
printf("\nElement:");
scanf(" %d",&ele);
insert(a,ele,pos);
}
printf("\nThe elements in the Binary Tree:\n");
for( i=0;i<n1;i++)
{
printf("\t%d",a[i]);
}
printf("\nTotal number of nodes:%d\n",count(a, n1));
printf("\nThe SUM of the elements in the Binary tree: %d",sum(a, n1));
getch();
}
void insert( int *a ,int ele,int pos)
{
a[pos] = ele ;
}
int count(int *a,int n1)
{
int i;
int count=0;
for(i=0;i<n1;i++)
{
if(a[i] != 0)
{
count++;
}
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 23
}
return count;
}
int sum(int *a,int n1)
{
int i;
int count=0;
for(i=0;i<n1;i++)
{
if(a[i] != 0)
{
count +=a[i];
}
}
return count;
}
Output:
Manipulation in Binary Tree
-----------------------------------
Enter the number of nodes in binary tree: 3
The maximum number of possible positions: 7
Nodes position: 1
Element: 5
Nodes position: 6
Element: 3
Nodes position: 3
Element: 7
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 24
The elements in the Binary Tree:
0 5 0 7 0 0 3
Total number of nodes: 3
The SUM of the elements in the Binary tree: 15
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 25
Ex.No:6
LINEAR SEARCH IN DOUBLY LINKED LIST
AI M:
Write a program to create a doubly linked list and perform search for an element „x‟
using linear search.
PROGRAM:
#include<stdio.h>
#include<conio.h>
#include"malloc.h"
struct node
{
int data;
struct node *prev,*link;
};
void add(struct node **,int);
void display(struct node *);
void search(struct node *,int);
void main()
{
int num,n,i,elem,posi;
struct node *ptr,*temp;
ptr=NULL;
clrscr();
printf("Linear search in Doubly link list\n");
printf("----------------------------------------");
printf("\n");
printf("Enter the number ofelements in list:");
scanf("%d",&n);
printf("\n");
for(i=1;i<=n;i++)
{
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}
}
void display(struct node *pt)
{
printf("%d",pt->data);
pt=pt->link;
while(pt!=NULL)
{
printf("--> %d",pt->data);
pt=pt->link;
}
}
void search(struct node *pt,int elem)
{
struct node * temp;
int count=1;
temp=pt;
while(temp->data!=elem && temp->link!=NULL)
{
temp= temp->link;
++count;
}
if(temp->data==elem)
{
printf("Element %d found at the position %d",elem,count);
}
else
{
printf("Sorry Element Not found");
}
}
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Output:
Linear search in Doubly link list
---------------------------------------
Enter the number of elements in list:6
Enter the element you want to add:43
43
Enter the element you want to add:65
43--> 65
Enter the element you want to add:23
43--> 65--> 23
Enter the element you want to add:12
43--> 65--> 23--> 12
Enter the element you want to add:75
43--> 65--> 23--> 12--> 75
Enter the element you want to add:34
43--> 65--> 23--> 12--> 75--> 34
Enter the element to be searched: 75
Element 75 found at the position: 5
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 29
Ex.No:7
REVERSING A SINGLY LINKED LIST
AI M:
Write a program to create a singly linked list. Then using a function „reverse‟, reverse
the contents of the list.
PROGRAM:
# include<stdio.h>
# include<conio.h>
# include "malloc.h"
struct node
{
int data;
struct node *link;
};
void main()
{
int will,num,i;
struct node *ptr,*temp;
void add(struct node **,int );
void display(struct node *);
void reverse(struct node **);
ptr=NULL;
clrscr();
printf("Reverse the Link list\n");
printf("---------------------\n");
printf("\n");
printf("Enter the number of elements for list:");
scanf("%d",&will);
for(i=1;i<=will;i++)
{
printf(" Enter the element you want to add: ");
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scanf("%d",&num);
add(&ptr,num);
display(ptr);
printf("\n");
}
printf("\nAfter Reverse operation:\n");
reverse(&ptr);
printf("\n");
display(ptr);
getch();
}
void add(struct node **q,int num)
{
struct node *temp;
temp = *q;
if(*q==NULL)
{
*q=malloc(sizeof(struct node));
temp = *q;
}
else
{
while((temp->link)!=NULL)
{
temp=temp->link;
}
temp->link = malloc(sizeof(struct node));
temp=temp->link;
}
temp->data = num;
temp->link = NULL;
}
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void display(struct node *pt)
{
printf("%d",pt->data);
pt=pt->link;
while(pt!=NULL)
{
printf("--> %d",pt->data);
pt=pt->link;
}
}
void reverse(struct node ** pt)
{
struct node *temp1=*pt;
struct node *next=NULL,*prev=NULL;
while(temp1)
{
*pt=temp1;
next=temp1->link;
temp1->link=prev;
prev=temp1;
temp1=next;
}
}
Output:
Reverse the Link list
-------------------------
Enter the number of elements for list:6
Enter the element you want to add: 34
34
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Enter the element you want to add: 45
34--> 45
Enter the element you want to add: 12
34--> 45--> 12
Enter the element you want to add: 48
34--> 45--> 12--> 48
Enter the element you want to add: 63
34--> 45--> 12--> 48--> 63
Enter the element you want to add: 74
34--> 45--> 12--> 48--> 63--> 74
After Reverse operation:
74--> 63--> 48--> 12--> 45--> 34
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 33
Ex.No:8
INORDER TRAVERSAL ON A BST
AI M:
Write a program to insert elements on a binary search tree and display the result of an
inorder traversal on the tree.
PROGRAM:
#include<stdio.h>
#include<conio.h>
#include<alloc.h>
struct bnode
{
int data;
struct bnode *lchild,*rchild;
};
void insert(struct bnode **,int);
void inorder(struct bnode *);
void main()
{
int i,will,num,n;
struct bnode *root;
root=NULL;
clrscr();
printf("Inorder traversal in BST\n");
printf("------------------------\n");
printf("\n");
printf("Enter number of nodes for BST:");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
printf(" Enter the element you want to add:");
scanf("%d",&num);
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insert(&root,num);
printf("\n");
}
printf("Nodes displayed in INORDER traversal:\n");
printf("\n");
inorder(root);
getch();
}
void insert(struct bnode ** rt,int ele)
{
struct bnode *temp,*current;
current=malloc(sizeof(struct bnode));
current->data=ele;
current->lchild=NULL;
current->rchild=NULL;
temp=*rt;
if(*rt==NULL)
{
*rt=current;
}
else
{
while(temp!=NULL)
{
if(temp->data<ele)
{
if(temp->rchild==NULL)
{
temp->rchild=current;
temp=NULL;
}
else
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{
temp=temp->rchild;
}
}
else
{
if(temp->lchild==NULL)
{
temp->lchild=current;
temp=NULL;
}
else
{
temp=temp->lchild;
}
}
}
}
}
void inorder(struct bnode *rt)
{
if(rt!=NULL)
{
inorder(rt->lchild);
printf("\t%d",rt->data);
inorder(rt->rchild);
}
else
return;
}
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 36
Output:
Inorder traversal in BST
------------------------------
Enter the number of nodes for BST: 8
Enter the element you want to add: 35
Enter the element you want to add: 23
Enter the element you want to add: 60
Enter the element you want to add: 12
Enter the element you want to add: 80
Enter the element you want to add: 34
Enter the element you want to add: 24
Enter the element you want to add: 50
Nodes displayed in INORDER traversal:
12 23 24 34 35 50 60 80
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 37
Ex.No:9
PREORDER TRAVERSAL ON A BST
AI M:
Write a program to insert elements on a binary search tree and display the result of a
preorder traversal on the tree.
PROGRAM:
#include<stdio.h>
#include<conio.h>
#include<alloc.h>
struct bnode
{
int data;
struct bnode *lchild,*rchild;
};
void insert(struct bnode **,int);
void preorder(struct bnode *);
void main()
{
int i,will,num,n;
struct bnode *root;
root=NULL;
clrscr();
printf("Preorder traversal in BST\n");
printf("------------------------\n");
printf("\n");
printf("Enter number of nodes for BST:");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
printf(" Enter the element you want to add:");
scanf("%d",&num);
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Roll No: 09MA01 Page 38
insert(&root,num);
printf("\n");
}
printf("Nodes diaplayed in PREORDER traversal:\n");
printf("\n");
preorder(root);
getch();
}
void insert(struct bnode ** rt,int ele)
{
struct bnode *temp,*current;
current=malloc(sizeof(struct bnode));
current->data=ele;
current->lchild=NULL;
current->rchild=NULL;
temp=*rt;
if(*rt==NULL)
{
*rt=current;
}
else
{
while(temp!=NULL)
{
if(temp->data<ele)
{
if(temp->rchild==NULL)
{
temp->rchild=current;
temp=NULL;
}
else
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Roll No: 09MA01 Page 39
{
temp=temp->rchild;
}
}
else
{
if(temp->lchild==NULL)
{
temp->lchild=current;
temp=NULL;
}
else
{
temp=temp->lchild;
}
}
}
}
}
void preorder(struct bnode *rt)
{
if(rt!=NULL)
{
printf("\t%d",rt->data);
preorder(rt->lchild);
preorder(rt->rchild);
}
else
return;
}
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 40
Output:
Preorder traversal in BST
-------------------------------
Enter the number of nodes for BST: 8
Enter the element you want to add: 12
Enter the element you want to add: 45
Enter the element you want to add: 67
Enter the element you want to add: 34
Enter the element you want to add: 23
Enter the element you want to add: 11
Enter the element you want to add: 5
Enter the element you want to add: 1
Nodes displayed in PREORDER traversal:
12 11 5 1 45 34 23 67
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 41
Ex.No:10
POSTORDER TRAVERSAL ON A BST
AI M:
Write a program to insert elements on a binary search tree and display the result of a
postorder traversal on the tree.
PROGRAM:
#include<stdio.h>
#include<conio.h>
#include<alloc.h>
struct bnode
{
int data;
struct bnode *lchild,*rchild;
};
void insert(struct bnode **,int);
void postorder(struct bnode *);
void main()
{
int i,will,num,n;
struct bnode *root;
root=NULL;
clrscr();
printf("Postorder traversal in BST\n");
printf("------------------------\n");
printf("\n");
printf("Enter number of nodes for BST:");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
printf(" Enter the element you want to add:");
scanf("%d",&num);
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insert(&root,num);
printf("\n");
}
printf("Nodes displayed in POSTORDER travesal:\n");
printf("\n");
postorder(root);
getch();
}
void insert(struct bnode ** rt,int ele)
{
struct bnode *temp,*current;
current=malloc(sizeof(struct bnode));
current->data=ele;
current->lchild=NULL;
current->rchild=NULL;
temp=*rt;
if(*rt==NULL)
{
*rt=current;
}
else
{
while(temp!=NULL)
{
if(temp->data<ele)
{
if(temp->rchild==NULL)
{
temp->rchild=current;
temp=NULL;
}
else
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Roll No: 09MA01 Page 43
{
temp=temp->rchild;
}
}
else
{
if(temp->lchild==NULL)
{
temp->lchild=current;
temp=NULL;
}
else
{
temp=temp->lchild;
}
}
}
}
}
void postorder(struct bnode *rt)
{
if(rt!=NULL)
{
postorder(rt->lchild);
postorder(rt->rchild);
printf("\t%d",rt->data);
}
else
return;
}
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 44
Output:
Postorder traversal in BST
---------------------------------
Enter the number of nodes for BST: 8
Enter the element you want to add: 45
Enter the element you want to add: 12
Enter the element you want to add: 34
Enter the element you want to add: 50
Enter the element you want to add: 67
Enter the element you want to add: 58
Enter the element you want to add: 23
Enter the element you want to add: 90
Nodes displayed in POSTORDER traversal:
23 34 12 58 90 67 50 45
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 45
Ex.No:11
MERGING LINKED LISTS
AI M:
Write a program to combine two singly linked lists such that suppose one is {l1, l2,
l3, … ln} and the other is {M1, m2, … mn}, then the combined list is {l1, m1, l2, m2, …ln,
mn}.
PROGRAM:
# include<stdio.h>
# include<conio.h>
# include "malloc.h"
struct node
{
int data;
struct node *link;
};
void add(struct node **,int );
void display(struct node *);
void merge(struct node ** list1,struct node ** list2);
int count(struct node *);
void main()
{
int num,n,n2,i,j,elem,posi;
struct node *ptr,*ptr1,*temp;
ptr=NULL;
ptr1=NULL;
clrscr();
printf("Merge two Link lists\n");
printf("--------------------\n");
printf("\n");
printf("Enter no ofelements of List 1:");
scanf("%d",&n)
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for(i=1;i<=n;i++)
{
printf(" Enter the element you want to add: ");
scanf("%d",&num);
add(&ptr,num);
display(ptr);
printf("\n");
}
printf("Enter no ofelements of List 2:");
scanf("%d",&n2);
for(j=1;j<=n2;j++)
{
printf(" Enter the element you want to add: ");
scanf("%d",&num);
add(&ptr1,num);
display(ptr1);
printf("\n");
}
printf("\nAfter Merging of List 1 & List 2:\n");
printf("\n");
merge(&ptr,&ptr1);
display(ptr);
getch();
}
void add(struct node **q,int num)
{
struct node *temp;
temp = *q;
if(*q==NULL)
{
*q=malloc(sizeof(struct node));
temp = *q;
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}
else
{
while((temp->link)!=NULL)
{
temp=temp->link;
}
temp->link = malloc(sizeof(struct node));
temp=temp->link;
}
temp->data = num;
temp->link = NULL;
}
void display(struct node *pt)
{
printf("%d",pt->data);
pt=pt->link;
while(pt!=NULL)
{
printf("--> %d",pt->data);
pt=pt->link;
}
}
void merge(struct node ** list1,struct node ** list2)
{
int last;
struct node * temp1,* temp2,* temp1nxt,*temp2nxt,*prev;
temp1=*list1;
temp2=*list2;
prev=temp1;
while(temp1->link!=NULL && temp2->link!=NULL)
{
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temp1nxt=temp1->link;
temp2nxt=temp2->link;
temp1->link=temp2;
temp2->link=temp1nxt;
temp1=temp1nxt;
temp2=temp2nxt;
}
if(temp1->link==NULL)
{
temp1->link=temp2;
}
else
{
temp1nxt=temp1->link;
temp1->link=temp2;
temp2->link=temp1nxt;
}
*list1=prev;
}
Output:
Merge two Link lists
--------------------------
Enter the number of elements of List 1: 5
Enter the element you want to add: 1
1
Enter the element you want to add: 3
1--> 3
Enter the element you want to add: 5
1--> 3--> 5
Enter the element you want to add: 7
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1--> 3--> 5--> 7
Enter the element you want to add: 9
1--> 3--> 5--> 7--> 9
Enter the number of elements of List 2: 5
Enter the element you want to add: 2
2
Enter the element you want to add: 4
2--> 4
Enter the element you want to add: 6
2--> 4--> 6
Enter the element you want to add: 8
2--> 4--> 6--> 8
Enter the element you want to add: 10
2--> 4--> 6--> 8--> 10
After Merging of List 1 & List 2:
1--> 2--> 3--> 4--> 5--> 6--> 7--> 8--> 9--> 10
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 50
Ex.No:12
DATABASE USING LINKED LISTS
AI M:
Write a program that reads the name, age and salary of 10 persons and maintains them
in a linked list sorted by name.
PROGRAM:
#include<stdio.h>
#include<conio.h>
#include<ctype.h>
#include<string.h>
struct node
{
char name[20];
int age;
int salary;
struct node *next;
}*current,*temp,*start,*prev;
void insertnode(char [],int,int);
void main()
{
int i,*nam,a,s;
clrscr();
start=temp=prev=current=NULL;
printf("Database using Link List\n");
printf("------------------------\n");
printf("\n");
printf("\nEnter the Details");
for(i=0;i<10;i++)
{
printf("\nName of the employee: ");
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scanf("%s",nam);
printf("\nAge: ");
scanf("%d",&a);
printf("\nSalary: ");
scanf("%d",&s);
insertnode(nam,a,s);
}
temp=start;
printf("\nNAME AGE SALARY");
printf("\n------------------");
while(temp!=NULL)
{
printf("\n%s %d %d",temp->name,temp->age,temp->salary);
temp=temp->next;
}
getch();
}
void insertnode(char nam[],int a,int s)
{
current=(struct node*)malloc(sizeof(struct node));
strcpy(current->name,nam);
current->age=a;
current->salary=s;
current->next=NULL;
if(start==NULL)
{
start=current;
}
else
{
temp=start;
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while((strcmp(temp->name,current->name))<0)
{
if(temp->next==NULL)
{
temp->next=current;
break;
}
else
{
prev=temp;
temp=temp->next;
}
}
if(strcmp(temp->name,current->name)>0)
{
if(temp==start)
{
current->next=start;
start=current;
}
else
{
current->next=temp;
prev->next=current;
}
}
}
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 53
Output:
Database using Link List
------------------------------
Name of the employee: suresh
Age: 23
Salary: 4500
Name of the employee: jeffe
Age: 22
Salary: 4200
Name of the employee: arul
Age: 24
Salary: 5000
Name of the employee: zamil
Age: 23
Salary: 4500
Name of the employee: berry
Age: 24
Salary: 5000
Name of the employee: sachin
Age: 35
Salary: 4580
Name of the employee: david
Age: 23
Salary: 6000
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 54
Name of the employee: ruban
Age: 23
Salary: 3565
Name of the employee: viki
Age: 23
Salary: 5342
Name of the employee: jose
Age: 34
Salary: 6543
NAME AGE SALARY
---------- ------- -------------
arul 24 5000
berry 24 5000
david 23 6000
jeffe 22 4200
jose 34 6543
ruban 23 3565
sachin 35 4580
suresh 23 4500
viki 23 5342
zamil 23 4500
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 55
Ex.No:13
SIMILAR BINARY TREES
AI M:
Write a program to determine whether or not one binary tree is similar to some other
binary tree.
PROGRAM:
#include <stdio.h>
#include <conio.h>
#include <malloc.h>
#include <math.h>
void similar(int *a,int n1,int *b,int n2);
void insert( int *a ,int ele,int pos);
void main()
{
int n,i,n1,pos,ele;
int bin,bin2;
clrscr();
printf("\n Checking of similar Binary Trees");
printf("\n---------------------------------");
printf("\n");
printf("\n Enter the number of nodes in binary tree 1:");
scanf(" %d",&n);
n1= pow(2,n)-1;
printf(" The max number of possible position is %d\n",n1);
int *a = (int *) malloc (n1 * sizeof(int));
for( i=0;i<n1;i++)
{
a[i]=0;
}
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for( i=0;i<n;i++)
{
printf("\nPosition and Element: \n");
scanf(" %d %d",&pos,&ele);
insert(a,ele,pos);
}
for( i=0;i<n1;i++)
{
printf("\nNodes of Tree 1: \t%d",a[i]);
}
printf(" \nEnter the number of nodes in binary tree 2:");
scanf(" %d",&bin);
bin2= pow(2,bin)-1;
printf("\nThe max number of possible position i %d\n",bin2);
int *b = (int *) malloc (bin2 * sizeof(int));
for( i=0;i<bin2;i++)
{
b[i]=0;
}
for( i=0;i<bin;i++)
{
printf(" \nThe position and Element:\n");
scanf(" %d %d",&pos,&ele);
insert(b,ele,pos);
}
for( i=0;i<bin2;i++)
{
printf("\nNodes of Tree 2 \t%d",b[i]);
}
similar(a,n1,b,bin2);
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getch();
}
void insert( int *a ,int ele,int pos)
{
a[pos] = ele ;
}
void similar(int *a,int n1,int *b,int n2)
{
int i=0;
if(n1 != n2)
{
printf("\n\nRESULT:Not a Similar tree\n");
return ;
}
else
{
while((a[i]==b[i])&&i!=n1-1)
{
++i;
}
if(i!=n1-1)
{
printf("\n\nRESULT: Not a similar tree\n ");
return ;
}
else
{
printf("\n\nRESULT: Similar Tree");
}
}
}
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Output:
Checking of similar Binary Trees
----------------------------------------
Enter the number of nodes in binary tree 1: 3
The max number of possible position is 7
Position and Element:
0
4
Position and Element:
3
6
Position and Element:
6
2
Nodes of Tree 1:
4 0 0 6 0 0 2
Enter the number of nodes in binary tree 2: 3
The max number of possible position is 7
The position and Element:
0
4
The position and Element:
3
6
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The position and Element:
6
2
Nodes of Tree 2 :
4 0 0 6 0 0 2
RESULT: Similar Tree
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Roll No: 09MA01 Page 60
Ex.No:14
INTERSECT DOUBLY LINKED LISTS
AI M:
Write a program to intersect two doubly linked lists.
PROGRAM:
#include<stdio.h>
#include<conio.h>
#include"malloc.h"
struct node
{
int data;
struct node *prev,*link;
};
void add(struct node **,int);
void display(struct node *);
void intersect(struct node **,struct node **,struct node **);
void main()
{
int num,n,i,j,elem,posi;
struct node *ptr,*ptr1,*tempy;
ptr=NULL;
ptr1=NULL;
tempy=NULL;
clrscr();
printf("Intersection on two Link lists\n");
printf("-----------------------------------\n");
printf("\n");
printf("\nEnter no ofelements in list 1:");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
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printf(" Enter the element you want to add: ");
scanf("%d",&num);
add(&ptr,num);
display(ptr);
printf("\n");
}
printf("Enter the no of elements in list 2:");
scanf("%d",&elem);
for(j=1;j<=elem;j++)
{
printf(" Enter the element you want to add: ");
scanf("%d",&num);
add(&ptr1,num);
display(ptr1);
printf("\n");
}
intersect(&ptr,&ptr1,&tempy);
printf("\nIntersected link list:\n");
printf("\n");
display(tempy);
getch();
}
void add(struct node ** pt,int num)
{
struct node *temp,*current,*previous;
current=malloc(sizeof(struct node));
current->data=num;
current->prev=NULL;
current->link=NULL;
temp=*pt;
if(temp==NULL)
{
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*pt=current;
}
else
{
while(temp->link!=NULL)
{
previous=temp;
temp=temp->link;
}
temp->link=current;
current->prev=previous;
}
}
void display(struct node *pt)
{
printf("%d",pt->data);
pt=pt->link;
while(pt!=NULL)
{
printf("--> %d",pt->data);
pt=pt->link;
}
}
void intersect(struct node **pt1,struct node **pt2,struct node **result)
{
struct node *temp1,*temp2,*current,*tem,*previous;
current=malloc(sizeof(struct node));
current->link=NULL;
current->prev=NULL;
temp1=*pt1;
temp2=*pt2;
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while(temp1)
{
while(temp1->data!=temp2->data&&temp2!=NULL)
{
temp2=temp2->link;
}
if(temp1->data==temp2->data)
{
if(*result==NULL)
{
current->data=temp1->data;
*result=current;
tem=*result;
previous=tem;
}
else
{
while(tem!=NULL)
{
previous=tem;
tem=tem->link;
}
previous->link=malloc(sizeof(struct node));
previous->link->data=temp1->data;
previous->link->prev=previous;
previous->link->link=NULL;
}
}
tem=*result;
temp2=*pt2;
temp1=temp1->link;
}
}
8/8/2019 Data structure Lab progrms
http://slidepdf.com/reader/full/data-structure-lab-progrms 64/69
Name : A. Arul Jefferson
Roll No: 09MA01 Page 64
Output:
Intersection on two Link lists
-----------------------------------
Enter no ofelements in list 1: 5
Enter the element you want to add: 4
4
Enter the element you want to add: 7
4--> 7
Enter the element you want to add: 2
4--> 7--> 2
Enter the element you want to add: 8
4--> 7--> 2--> 8
Enter the element you want to add: 1
4--> 7--> 2--> 8--> 1
Enter the no of elements in list 2: 5
Enter the element you want to add: 1
1
Enter the element you want to add: 3
1--> 3
Enter the element you want to add: 8
1--> 3--> 8
Enter the element you want to add: 9
1--> 3--> 8--> 9
Enter the element you want to add: 4
1--> 3--> 8--> 9--> 4
Intersected link list:
4--> 8--> 1
8/8/2019 Data structure Lab progrms
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 65
Ex.No:15
SINGLY LINKED LIST FROM DOUBLY LINKED LIST
AI M:
Write a program to generate a singly linked list from it‟s doubly linked list
representation.
PROGRAM:
#include<stdio.h>
#include<conio.h>
#include"malloc.h"
struct node
{
int data;
struct node *prev,*link;
};
struct node1
{
int data;
struct node1 *link;
};
void add(struct node **,int);
void display(struct node *);
void generate(struct node **pt,struct node1 **pt1);
void display1(struct node1 *);
void main()
{
int num,n,i,elem,posi;
struct node *ptr,*temp;
struct node1 *ptr1;
ptr=NULL;
ptr1=NULL;
clrscr();
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 66
printf("Generation of Single link list from Double link list\n");
printf("----------------------------------------------------\n");
printf("\n");
printf("Enter the number of elements you want to insert in DOUBLE link list:");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
printf(" Enter the element you want to add :");
scanf("%d",&num);
add(&ptr,num);
display(ptr);
printf("\n");
}
generate(&ptr,&ptr1);
printf("\nAfter conversion from Double link list to Single link list:\n");
printf("\n");
display1(ptr1);
getch();
}
void add(struct node ** pt,int num)
{
struct node *temp,*current,*previous;
current=malloc(sizeof(struct node));
current->data=num;
current->prev=NULL;
current->link=NULL;
temp=*pt;
if(temp==NULL)
{
*pt=current;
}
else
8/8/2019 Data structure Lab progrms
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 67
{
while(temp->link!=NULL)
{
previous=temp;
temp=temp->link;
}
temp->link=current;
current->prev=previous;
}
}
void display(struct node *pt)
{
printf("%d",pt->data);
pt=pt->link;
while(pt!=NULL)
{
printf("<--> %d",pt->data);
pt=pt->link;
}
}
void display1(struct node1 *pt)
{
printf("%d",pt->data);
pt=pt->link;
while(pt!=NULL)
{
printf("--> %d",pt->data);
pt=pt->link;
}
}
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Name : A. Arul Jefferson
Roll No: 09MA01 Page 68
void generate(struct node **pt,struct node1 **pt1)
{
int ele;
struct node *temp;
struct node1 *temp1,*current;
current=malloc(sizeof(struct node1));
current->link=NULL;
temp=*pt;
temp1=*pt1;
if(*pt==NULL)
{
printf("List is empty");
}
else
{
ele=temp->data;
current->data=ele;
temp1=current;
temp=temp->link;
*pt1=temp1;
while(temp)
{
ele=temp->data;
temp1->link=malloc(sizeof(struct node1));
temp1=temp1->link;
temp1->data=ele;
temp1->link=NULL;
temp=temp->link;
}
}
}
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Output:
Generation of Single link list from Double link list
------------------------------------------------------------
Enter the number of elements you want to insert in DOUBLE link list:4
Enter the element you want to add : 4
4
Enter the element you want to add : 7
4<--> 7
Enter the element you want to add : 2
4<--> 7<--> 2
Enter the element you want to add : 8
4<--> 7<--> 2<--> 8
After conversion from Double link list to Single link list:
4--> 7--> 2--> 8
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