stack.cpp

计算机图形学的一个作业

// Stack.cpp : implementation file
//

#include "stdafx.h"
#include "多边形填充.h"
#include "Stack.h"
#include "malloc.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CStack

IMPLEMENT_DYNCREATE(CStack, CView)

CStack::CStack()
{
}

CStack::~CStack()
{
}


BEGIN_MESSAGE_MAP(CStack, CView)
	//{{AFX_MSG_MAP(CStack)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CStack drawing

void CStack::OnDraw(CDC* pDC)
{
	CDocument* pDoc = GetDocument();
	// TODO: add draw code here
}

/////////////////////////////////////////////////////////////////////////////
// CStack diagnostics

#ifdef _DEBUG
void CStack::AssertValid() const
{
	CView::AssertValid();
}

void CStack::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CStack message handlers

CPoint CStack::GetTop()
{
	if(top ==base )
		return NULL;
	CPoint e;
	
	e=*(top -1);
	return e;

}

void CStack::Push(CPoint e)
{
	if((top -base)>=stacksize )
	{
		base =(CPoint *) realloc(base ,(stacksize +STACKINCREMENT)* sizeof(CPoint));
		if(!base ) return;
		top =base +stacksize ;
		stacksize += STACKINCREMENT;
	}
	*top++ =e;
	
	return;
}

void CStack::Init()
{
	base =(CPoint *)malloc(STACK_INIT_SIZE * sizeof(CPoint));
	if(!base ) return;
	top =base ;
	stacksize =STACK_INIT_SIZE;
	return;

}

void CStack::Pop()
{
	
	if(top ==base ) return;
	e = * --top ;
	
}

int CStack::IsEmpty()
{
	if(base ==top )
		return 1;
	else return 0;


}