c program to add and delete an element from circular queue
using array

Answer Posted / vinit

#include<stdio.H>
#include<conio.h>
#define MAXQ 10
struct cq
{
int data[MAX];
int front,rear;
};
void add(struct cq*,int);
int del(struct cq*);
void main()
{
int ch,item;
struct cq q1;
q1.front=q1.rear=-1;
printf("\t\tMAIN MENU\n");
printf("\t\t************\n");
printf("\t\t 1.Add in a circular queue\n");
printf("\t\t 2.delete from circular queue\n");
printf("\t\t 3.Exit\n");
printf("\t\t Enter your choice\n");
scanf("%d",&ch);
clrscr();
switch(ch)
{
case 1:
printf("Enter the value which is to be add:-");
scanf("%d",&item);
add(&q1,item);
break;
case 2:
item=del(&q1);
if(item!=NULL)
printf("Delete value ->%d",item);
break;
case 3:
break;
default:
printf("Wromg choice !Try again") ;
}
getch();
}
while(ch!=3);
}

void add(struct cq*p,int item)
{
if(p->rear==MAX-1 && p->front==0 || p->rear+1==p->front)
{
printf("Queue is full\n");
return;
}
if(p-.front==-1)
p->front=p->raer=0;
else if(p->rear=MAX-1)
p->rear=0;
else
p->rear++;
p->data[p->rear]=item;
}

int del(struct cq*p)
{
int item;
if(p->front==-1)
{
printf("Queue is Empty");
return(NULL);
}
item=p->data[p->front];
if(p->front==p->rear)
p->front=p->rear=-1;
else if(p->front==MAX-1)
p->front=0;
else
p->front++;
return(item);
}

Is This Answer Correct ?    26 Yes 36 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What will the code below print when it is executed?   int x = 3, y = 4;         if (x = 4)                 y = 5;         else                 y = 2;         printf ("x=%d, y=%d ",x,y);

1361


What is the hardest programming language?

673


What is identifier in c?

550


What is a far pointer in c?

600


What is the translation phases used in c language?

640






Write a program to swap two numbers without using third variable?

817


What is variable declaration and definition in c?

505


what is diffrence between linear and binary search in array respect to operators?what kind of operator can be used in both seach methods?

1457


What is switch in c?

651


Write a c program to demonstrate character and string constants?

1689


In which layer of the network datastructure format change is done

1439


Why & is used in scanf in c?

629


Write a code to generate divisors of an integer?

645


1) There is a singing competition for children going to be conducted at a local club. Parents have been asked to arrive at least an hour before and register their children’s names with the Program Manager. Whenever a participant registers, the Program Manager has to position the name of the person in a list in alphabet order. Write a program to help the Program Manager do this by placing the name in the right place each time the Program Manger enters a name. 2) the Event Manager has to send participants to the stage to perform in the order in which they registered. Write a program that will help the Event Manager know who to call to the stage to perform. The Logic should be in Data Structures

2747


Why can’t constant values be used to define an array’s initial size?

840