#include <stdio.h>

#include <stdlib.h>

#define MAXSIZE 5

int front=-1,rear=-1,q[MAXSIZE];

void insert(int a){

if(rear>=MAXSIZE){

printf("sorry!! \n queue is full \n");

}

else{

if(front==-1) front=0;

rear++;

q[rear]=a;

printf("element %d is successfully added\n",a);

}

}

void delete(){

if(front<0){

printf("Error!! \n Underflow condition\n");

}

else if(front==rear){

q[front]=0;

front=-1;

rear=-1;

printf("element successfully delete\n");

}

else{

q[front]=0;

front++;

printf("element successfully delete\n");

}

}

void display(){

int i=0;

for(i=0;i<=MAXSIZE;i++){

printf(" %d |",q[i]);

}

printf("\n");

}

int main(){

int choise=0,inse;

printf(" 1) insert element \n 2) delete element \n 3) display queue \n 4) exit\n ");

while(choise != 4){

printf("enter your choice : ");

scanf("%d",&choise);

switch(choise)

{

case 1:

printf("enter a number which you want to add in queue:");

scanf("%d",&inse);

insert(inse);

break;

case 2:

printf("you chose delete option\n");

delete();

break;

case 3:

printf("you chose display option\n");

display();

break;

case 4:

printf("\nI hope u enjoy this program \n");

break;

}

}

return 0;

}