Queue operations using linked list

#include "stdio.h"
#include "malloc.h"
#define MAXSIZE 10

void insertion();
void deletion();
void display();

struct node
{
int info;
struct node *link;
}
*new,*temp,*p,*front=NULL,*rear=NULL;
typedef struct node N;


main()
{
int ch;
do
{
printf("\n\t\t\tLinked queue");
printf("\n 1.Insertion");
printf("\n 2.Deletion");
printf("\n 3.Display");
printf("\n 4.Exit");
printf("\n Enter your choice : ");
scanf("%d",&ch);
switch(ch)
{
case 1:
insertion();
break;
case 2:
deletion();
break;
case 3:
display();
break;
default:
break;
}
}
while(ch<=3);
}
void insertion()
{
int item;
new=(N*)malloc(sizeof(N));
printf("\nEnter the item : ");
scanf("%d",&item);
new->info=item;
new->link=NULL;
if(front==NULL)
front=new;
else
rear->link=new;
rear=new;
}

void deletion()
{
if(front==NULL)
printf("\nQueue is empty");
else
{
p=front;
printf("\nDeleted element is : %d",p->info);
front=front->link;
free(p);
}
}

void display()
{
if(front==NULL)
printf("\nQueue is empty");
else
{
printf("\nThe elements are : ");
temp=front;
while(temp!=NULL)
{
printf("%d",temp->info);
temp=temp->link;
}
}
}

Related Links :