Write a C Program that uses functions to perform the following operations on a double linked list Creation, Insertion, Deletion
#include<stdio.h>
#include<stdlib.h>
struct node
{
struct node *prev;
struct node *next;
int data;
};
struct node *head;
void insertion_beginning();
void insertion_last();
void deletion_beginning();
void deletion_last();
void display();
void search();
void main ()
{
int choice =0;
while(choice != 9)
{
printf("\nMain Menu\n");
printf("\nChoose one option:\n");
printf("\n1.Insert in Beginning\n2.Insert at last\n3.Delete from Beginning\n4.Delete from last\n5.Search\n6.Show\n7.Exit\n");
printf("\nEnter your choice?\n");
scanf("\n%d",&choice);
switch(choice)
{
case 1:
insertion_beginning();
break;
case 2:
insertion_last();
break;
case 3:
deletion_beginning();
break;
case 4:
deletion_last();
break;
case 5:
search();
break;
case 6:
display();
break;
case 7:
printf("\nPiyush \n 315/CSE/2019");
exit(0);
break;
default:
printf("Please enter valid choice..");
}
}
}
void insertion_beginning()
{
struct node *ptr,*temp;
int item;
ptr = (struct node *)malloc(sizeof(struct node));
if(ptr == NULL)
{
printf("\nOVERFLOW");
}
else
{
printf("\nEnter Item value");
scanf("%d",&item);
ptr->data=item;
if(head==NULL)
{
head = ptr;
ptr -> next = head;
ptr -> prev = head;
}
else
{
temp = head;
while(temp -> next != head)
{
temp = temp -> next;
}
temp -> next = ptr;
ptr -> prev = temp;
head -> prev = ptr;
ptr -> next = head;
head = ptr;
}
printf("\nNode inserted\n");
}
}
void insertion_last()
{
struct node *ptr,*temp;
int item;
ptr = (struct node *) malloc(sizeof(struct node));
if(ptr == NULL)
{
printf("\nOVERFLOW");
}
else
{
printf("\nEnter value");
scanf("%d",&item);
ptr->data=item;
if(head == NULL)
{
head = ptr;
ptr -> next = head;
ptr -> prev = head;
}
else
{
temp = head;
while(temp->next !=head)
{
temp = temp->next;
}
temp->next = ptr;
ptr ->prev=temp;
head -> prev = ptr;
ptr -> next = head;
}
}
printf("\nnode inserted\n");
}
void deletion_beginning()
{
struct node *temp;
if(head == NULL)
{
printf("\n UNDERFLOW");
}
else if(head->next == head)
{
head = NULL;
free(head);
printf("\nnode deleted\n");
}
else
{
temp = head;
while(temp -> next != head)
{
temp = temp -> next;
}
temp -> next = head -> next;
head -> next -> prev = temp;
free(head);
head = temp -> next;
}
}
void deletion_last()
{
struct node *ptr;
if(head == NULL)
{
printf("\n UNDERFLOW");
}
else if(head->next == head)
{
head = NULL;
free(head);
printf("\nnode deleted\n");
}
else
{
ptr = head;
if(ptr->next != head)
{
ptr = ptr -> next;
}
ptr -> prev -> next = head;
head -> prev = ptr -> prev;
free(ptr);
printf("\nnode deleted\n");
}
}
void display()
{
struct node *ptr;
ptr=head;
if(head == NULL)
{
printf("\nnothing to print");
}
else
{
printf("\n printing values ... \n");
while(ptr -> next != head)
{
printf("%d\n", ptr -> data);
ptr = ptr -> next;
}
printf("%d\n", ptr -> data);
}
}
void search()
{
struct node *ptr;
int item,i=0,flag=1;
ptr = head;
if(ptr == NULL)
{
printf("\nEmpty List\n");
}
else
{
printf("\nEnter item which you want to search?\n");
scanf("%d",&item);
if(head ->data == item)
{
printf("item found at location %d",i+1);
flag=0;
}
else
{
while (ptr->next != head)
{
if(ptr->data == item)
{
printf("item found at location %d ",i+1);
flag=0;
break;
}
else
{
flag=1;
}
i++;
ptr = ptr -> next;
}
}
if(flag != 0)
{
printf("Item not found\n");
}
}
}
Q10
#include<stdio.h>
#include<conio.h>
int min(int,int);
void floyds(int p[10][10],int n) {
int i,j,k;
for (k=1;k<=n;k++)
for (i=1;i<=n;i++)
for (j=1;j<=n;j++)
if(i==j)
p[i][j]=0; else
p[i][j]=min(p[i][j],p[i][k]+p[k][j]);
}
int min(int a,int b) {
if(a<b)
return(a); else
return(b);
}
void main() {
int p[10][10],w,n,e,u,v,i,j;
printf("\n Enter the number of vertices:");
scanf("%d",&n);
printf("\n Enter the number of edges:\n");
scanf("%d",&e);
for (i=1;i<=n;i++) {
for (j=1;j<=n;j++)
p[i][j]=999;
}
for (i=1;i<=e;i++) {
printf("\n Enter the end vertices of edge%d with its weight \n",i);
scanf("%d%d%d",&u,&v,&w);
p[u][v]=w;
}
printf("\n Matrix of input data:\n");
for (i=1;i<=n;i++) {
for (j=1;j<=n;j++)
printf("%d \t",p[i][j]);
printf("\n");
}
floyds(p,n);
printf("\n Transitive closure:\n");
for (i=1;i<=n;i++) {
for (j=1;j<=n;j++)
printf("%d \t",p[i][j]);
printf("\n");
}
printf("\n The shortest paths are:\n");
for (i=1;i<=n;i++)
for (j=1;j<=n;j++) {
if(i!=j)
printf("\n <%d,%d>=%d",i,j,p[i][j]);
}
getch();
}
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