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);
}
int main()
{
struct node *front, *rear;
front=rear=NULL;
addatend(&front, &rear, 10); //10
qdisplay(front);
addatbeg(&front, &rear, 20); //20 10
qdisplay(front);
addatbeg(&front, &rear, 30); //30 20 10
qdisplay(front);
addatend(&front, &rear, 5); //30 20 10 5
qdisplay(front);
delbeg(&front, &rear); //20 10 5
qdisplay(front);
delend(&front, &rear); //20 10
qdisplay(front);
getch();
}