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POinsert a node at end and delete a node at beginning in double linked list
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copied!<p>Double linked list program </p> <pre><code>#include<stdio.h> #include<stdlib.h> struct node { int data; struct node *rnext; struct node*lnext; }*first=NULL,*last=NULL; void display() { struct node*temp; if(first==NULL) { printf("list is empty\n"); return; } temp=first; while(temp!=NULL) { printf("%d \n",temp->data); temp=temp->rnext; } } void insertion() { struct node *temp; struct node *nn= (struct node*) malloc(sizeof(struct node)); printf("enter data to be inserted\n"); nn->rnext=NULL; last->rnext=nn; nn->lnext=last; last=nn; } void deletion() { struct node *temp; if(first==NULL||last==NULL) { printf("list is empty\n"); return; } temp=first; first=first->rnext; first->lnext=NULL; free(temp); } /* main loop */ int main() { int option; do { printf("enter option 1.insertion\n2.display\n3.deletion\n4.exit\n"); scanf("%d",&option); switch(option) { case 1: insertion(); break; case 2: display(); break; case 3: deletion(); break; } } while(option!=4); } </code></pre> <p>i have wrote a double linked list to insert a node at end and delete a node at beginning in linux using C language. but while executing the program getting the error segmentation fault. i am also posting the output.</p> <pre><code>./out enter option 1.insertion 2.display 3.deletion 4.exit 1 enter data to be inserted 12 Segmentation fault please help me with the solution for segmentation fault </code></pre> <p>this is my code please help me run it and debug it .I am inserting the node at the end and deleting the node at the end </p>

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