// IntStack.cpp
// Integer stack class member functions
// CS210 - S'03 - 3/4/03 - Ray S. Babcock
//

#include "IntStack.h"

IntStack::IntStack(int s)
{
	if(s<0) s=10;
	size = s;
	top = -1;
	stackPtr = new int[size];
}

IntStack::~IntStack()
{
	delete [] stackPtr;
}

bool IntStack::push(const int & pushValue)
{
	if(!isFull())
	{
	   stackPtr[++top]=pushValue;
           return true;
        }
        return false;
}

bool IntStack::pop(int & popValue)
{
	if(!isEmpty())
	{
		popValue = stackPtr[top--];
	        return true;
	}
	return false;
}

bool IntStack::isEmpty() const
{
	return(top == -1);
}

bool IntStack::isFull() const
{
	return(top == (size-1));
}