Slip 10_1 ,22_1: Implement a linear queue library (st_queue.h) of integers using a static implementation of the queue and implementing the init(Q), add(Q) and peek(Q) operations. Write a program that includes queue library and calls different queue operations

-

 Solution :

Header File :st_queue.h

#include<stdio.h>

int Q[20];

int f,R;

void init()

{ f=R=-1;

}

int isempty()

{

 if(f==R)

 return 1;

 else

 return 0;

}

int isfull()

{

 if(R==19)

 return 1;

 else return 0;

}

void Add(int no)

{

 if(isfull()==1)

 printf("Queue is Full ");

 else

 {

 R++;

 Q[R]=no;

 }

}

int Delete()

{ int no;

 if(isempty()==1)

 printf("Queue is empty ");

 else

 {

 f++;

 no=Q[f];

 }

 return no;

}

oid display()

{

 int i;

 for(i=f+1;i<=R;i++)

 { printf("%d ",Q[i]);

 }

}

Program File :

#include<stdio.h>

#include "st_queue.h"

main()

{ int n,ch;

 init();

 do

 {

 printf("\n\n1.Add \n2.Delete \n3.Display \n0.EXit");

 printf("\nEnter choice ");

 scanf("%d",&ch);

 switch(ch)

 { case 1:printf("\nEnter element ");

 scanf("%d",&n);

 Add(n);

 break;

 case 2:if(isempty()==1)

 printf("\nQueue is empty ");

 else

 printf("deleted elemet =%d

",Delete());

 break;

 case 3:display();

 break;

 case 0:break;

 default:printf("\nInvalid choice ");

 }

 }while(ch!=0);

}


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