Thread: problems on stack.h

i have a code that causes errors in running the program...i use my header file stack.h on my program but it didn't work...what is the problem of that program?

Code:

#define DEFAULT_SIZE 10

class stack//declaration syntax error
{
private:
	int size;
	int top;
	int *values;
public:
	stack(int size=DEFAULT_SIZE);
	/*virtual*/~stack();
	int isFull();
	int isEmpty();
	void push(int);
	int pop(int);
}

stack::stack(int size)
{
this->size=size;
values=new int [size];
top=-1;
}
stack::~stack()
{
delete [] values;
}
int stack::isFull()
{
if(top<size-1)
	{
	return 0;
	}
else
	{
	return 1;
	}
}
int stack:: isEmpty()
{
if(top==-1)
	{
	return 1;
	}
else
	{
	return 0;
	}
}
void stack:: push(int x)
{
if(!isFull())
	{
	top++;
	values[top]=x;
	}
}
int stack::pop(int top)
{
	int retVal=0;
		if(! isEmpty())
		{
		retVal=values[top];
		top--;
		}
return retVal;
}