CODE STARTS HERE:
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
typedef struct intnode
{
int data;
struct intnode *next;
} intnode;
intnode *create(int n)
{
intnode *head, *q, *newnode;
head = (intnode *)malloc(sizeof(intnode));
scanf("%d", &head->data);
head->next = NULL;
q = head;
for (int i = 0; i < n - 1; i++)
{
newnode = (intnode *)malloc(sizeof(intnode));
scanf("%d", &newnode->data);
newnode->next = NULL;
q->next = newnode;
q = newnode;
}
return head;
}
void printList(intnode *head)
{
intnode *temp;
temp = head;
while (head != NULL)
{
printf("%d", head->data);
head = head->next;
printf("\n");
}
head = temp;
}
void insertList(intnode *head, int i, intnode *t)
{
intnode *r, *x;
if (i == 0)
{
t->next = head;
head = t;
return;
}
r = head;
for (int j = 1; (j < i - 1) && (r != NULL); j++)
{
r = r->next;
}
if ((r == NULL) && (i > 0))
{
return;
}
x = r;
t->next = x->next;
x->next = t;
return;
}
void deleteList(intnode *head, int i)
{
intnode *y, *x;
y = head;
if (i == 0)
{
head = head->next;
free(y);
return;
}
x = y->next;
for (int j = 1; (j < i) && (x != NULL); i++)
{
y = x;
x = x->next;
}
if ((x == NULL) && (i > 0))
{
return;
}
y->next = x->next;
x->next = NULL;
free(x);
return;
}
int main()
{
int n, l;
printf("Enter the no of nodes: \n");
scanf("%d", &n);
printf("Enter the elements of nodes: \n");
intnode *p = create(n);
printf("Nodes are: \n");
printList(p);
printf("If you want to insert node then press 1 and in case of delete node press 0 : \n");
int ans;
scanf("%d", &ans);
if (ans == 1)
{
printf("In what positiomn you want to insert the node ??\n");
scanf("%d", &l);
intnode *a;
a = (intnode *)malloc(sizeof(intnode));
printf("Enter the node data :\n");
scanf("%d", &a->data);
a->next = NULL;
insertList(p, l, a);
printf("After insertion the list is : \n");
printList(p);
}
else
{
printf("In what positiomn you want to delete the node ??\n");
scanf("%d", &l);
deleteList(p, l);
printf("After deletion the list is : \n");
printList(p);
}
return 0;
}
INPUT AND OUTPUT:
Enter the no of nodes:
4
Enter the elements of nodes:
11
12
14
54
Nodes are:
11
12
14
54
If you want to insert node then press 1 and in case of delete node press 0 :
1
In what positiomn you want to insert the node ??
1
Enter the node data :
16
After insertion the list is :
11
16
12
14
54