7. Student-SLL.c

#include <stdio.h>
#include <stdlib.h>

struct node
{
    struct node *next;
    char name[25], usn[15], programme[10];
    int sem;
    int ph_no;
} *newnode, *head = NULL, *temp, *tail,*prev;

void create(){
    newnode = (struct node *)malloc(sizeof(struct node));
    newnode->next = NULL;
    printf("\nEnter Name:");
    scanf("%s", newnode->name);
    printf("Enter USN:");
    scanf("%s", newnode->usn);
    printf("Enter Programme:");
    scanf("%s", newnode->programme);
    printf("Enter Sem:");
    scanf("%d", &newnode->sem);
    printf("Enter Phone Number:");
    scanf("%d", &newnode->ph_no);
  if (head == NULL){    
      tail = temp = head = newnode;
    }
  else{
      temp->next = newnode;
      temp=temp->next;
    }
}

int insertfront(){
    newnode = (struct node *)malloc(sizeof(struct node));
    newnode->next = NULL;
    printf("\nEnter Name:");
    scanf("%s", newnode->name);
    printf("Enter USN:");
    scanf("%s", newnode->usn);
    printf("Enter Programme:");
    scanf("%s", newnode->programme);
    printf("Enter Sem:");
    scanf("%d", &newnode->sem);
    printf("Enter Phone Number:");
    scanf("%d", &newnode->ph_no);
      newnode->next = head;
      head = newnode;
}

int delfront(){
    temp = head;
    head = temp->next;
    free(temp);
}

int insertend(){
    newnode = (struct node *)malloc(sizeof(struct node));
    printf("\nEnter Name:");
    scanf("%s", newnode->name);
    printf("Enter USN:");
    scanf("%s", newnode->usn);
    printf("Enter Programme:");
    scanf("%s", newnode->programme);
    printf("Enter Sem:");
    scanf("%d", &newnode->sem);
    printf("Enter Phone Number:");
    scanf("%d", &newnode->ph_no);
    temp=head;
    while(temp->next!=NULL){
        temp=temp->next;
    }
    temp->next=newnode;
    newnode->next=NULL;
}

int delend(){
    temp = head;
while (temp->next != NULL){
        prev = temp;
        temp = temp->next;
}
        prev->next = NULL;
        tail = prev;
        free(temp);
    }

void display(){
        temp = head;
        int count = 1;
    while (temp != NULL){
  printf("\nDetails of Student %d", count++);
  printf("\nName:%s\nUsn:%s\nProgramme:%s\nSem:%d\nPhone Number:%d\n", temp->name, temp->usn, temp->programme, temp->sem, temp->ph_no);
        temp = temp->next;
        }
}

int main(){
   int i, m, ch;
    while (1){
     printf("\nSingle linkedlist for Student details\n\n1.Create\n2.Insert at front\n3.Delete at front\n4.Insert at end\n5.Delete at end\n6.Display\n7.Exit\nEnter your choice:");
     scanf("%d", &ch);
        switch (ch)
    {
        case 1: printf("\nEnter No. of students:");
                scanf("%d", &m);
              for (i=0; i<m;i++){
                     create();}
                 break;
        case 2:insertfront();break;
        case 3:delfront();break;
        case 4:insertend();break;
        case 5:delend();break;
        case 6:display();break;
        case 7:exit(0);
       default:printf("\ninvalid choice\n");break;
      }
   }
}