C programming code for Queue. This program will Insert and Delete elements in Queue
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
int q[25], n ,front=-1 , rear=-1 , item;
void insertion()
{
if((rear==n) && (front==(rear+1))||(front==rear+1))
{
printf(“\nQueue Overflow\n”);
}
else if (rear==0)
front = rear = 1;
else if(rear==n)
rear=1;
else
rear=rear+1;
printf(“Enter the item : “);
scanf(“%d”,&item);
q[rear] = item;
printf(“%d is inserted\n\n”,item);
}
void deletion()
{
if(front==0)
{
printf(“\nQueue Underflow\n\n”);
}
item=q[front];
if(front==rear)
{
front=0;
rear=0;
}
else if (front=n)
front=1;
else
front=front+1;
printf(“\n%d is deleted\n\n”,item);
}
void show()
{
for(int i=0;i<=rear;i++)
printf(“%d\t”,q[i]);
}
int main()
{
int op;
printf(“Enter the size of the queue : “);
scanf(“%d”,&n);
do
{
printf(“\n1 : Insert”);
printf(“\n2 : Delete”);
printf(“\n3 : Print”);
printf(“\n4 : Exit”);
printf(“\nEnter your choice : “);
scanf(“%d”,&op);
switch(op)
{
case 1:
insertion();
break;
case 2:
deletion();
break;
case 3:
show();
break;
//default:
// printf(“Invalid Option. Try again.”);
}
}while(op!=4);
printf(“\n—THE END—\n”);
}
OUTPUT
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