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Queue Program in C
Ashish Srivastava
Apr 24
2016
Code
795
0
0
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#include<stdio.h>
#include<conio.h>
#define MAXSIZE 5
int
front=-1, rear=-1,choice;
int
q[10];
void
main()
{
clrscr();
do
{
printf(
"\n1-->insert\n"
);
printf(
"2-->delete\n"
);
printf(
"3-->display\n"
);
printf(
"4-->exit\n"
);
printf(
"enter your choice\n"
);
scanf(
"%d"
,&choice);
switch
(choice)
{
case
1:qinsert();
break
;
case
2:qdelete();
break
;
case
3:qdisplay();
break
;
case
4:
return
;
}
}
while
(choice!=4);
}
qinsert()
{
int
num;
if
(rear==(MAXSIZE-1))
{
printf(
"queue is full\n"
);
return
;
}
else
{
printf(
"enter no\n"
);
scanf(
"%d"
,&num);
rear=rear+1;
q[rear]=num;
if
(front==-1)
{
front++;
}
}
return
;
}
qdelete()
{
int
num;
if
(front==-1)
{
printf(
"queue empty\n"
);
return
;
}
else
{
if
(front==rear)
front=rear=-1;
else
{
num=q[front];
printf(
"deleted item=%d"
,q[front]);
front++;
}
}
return
(num);
}
qdisplay()
{
int
i;
if
(front==-1)
{
printf(
"queue empty\n"
);
return
;
}
else
{
printf(
"\nThe status of the queu\n"
);
for
(i=front;i<=rear;i++)
{
printf(
"%d\n"
,q[i]);
}
}
printf(
"\n"
);
}
queue Program
C