Stacks and Queues

[MAQAH]

The question is about a basic concept ,

Why cant we use the variable

s

rather than using

maxSize

.


Queue::Queue(int s) // constructor
{
maxSize = s;

queArray = new int[maxSize];

front = 0;
rear = -1;
nItems = 0;
}

cant we use it as

queArray=new int[s] ;

same thing happens in stacks also , and I dont know the exact reason why we do this way .. any one ?

[MAQAH]

ok guys , my self found an answer . I think yes we can use the variable

s

but we need the size of the array later for isFull() and isEmpty() functions . So , we need to store the value , the size of the array in a variable .. gotcha .. BINGO ..!!

[pogrady]

You should also check if variable s is zero.

I'm not sure why you can't use the variable s. If you wanted to know the array size later you can always use

size t = sizeof int / sizeofqueArray[0];

or store the size on a global variable.

[zb0S216C]

Ahamed Huzaim wrote:

"Why cant we use the variable
s
rather than using
maxSize
"

Maybe because "s" is local to "Queue::Queue( )", and beyond that, "s" will not exist, so you have to store the value of "s" in "maxSize" to extend the scope of "s"'s value.

Ahamed Huzaim wrote:

"cant we use it as
queArray=new int[s] ;
"

Yes, you can, and I don't see a reason not to.

_Wazzak