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#include<stdio.h> #include<stdlib.h> struct student { int rno; struct student*next; }; int main() { struct student*head,*temp,*newnode; int choice; head=NULL; do { printf("\nMENU"); printf("\n 1.INSERT BEGINNING\n2.DELETE BEGINNING\n3.DISPLAY\n4.EXIT"); printf("\nEnter your Choice"); scanf("%d",&choice); switch(choice) { case 1: newnode=(struct student*)malloc(sizeof(struct student)); printf("Enter Roll No:"); scanf("%d",&newnode->rno); if(head==NULL) { head=newnode; newnode->next=NULL; } else { newnode->next=head; head=newnode; } printf("%d is inserted at beginning\n",newnode->rno); break; case 2: if(head==NULL) printf("Linked List is Empty\n"); else { temp=head; head=head->next; printf("%d is deleted at beginning\n",temp->rno); free(temp); } break; case 3: if(head==NULL) printf("Linked List is Empty\n"); else { temp=head; printf("Contents of linked list\n"); while(temp!=NULL) { printf("\t%d",temp->rno); temp=temp->next; } } break; case 4: printf("Exiting the linked lidt"); break; default:printf("Invalid Option\n"); } } while(choice!=4); return 0; }