VC面向对象的学习教程

				// Tank.cpp: implementation of the CTank class.
				//
				//////////////////////////////////////////////////////////////////////
				
				#include "stdafx.h"
				#include "My.h"
				#include "Tank.h"
				
				#ifdef _DEBUG
				#undef THIS_FILE
				static char THIS_FILE[]=__FILE__;
				#define new DEBUG_NEW
				#endif
				
				//////////////////////////////////////////////////////////////////////
				// Construction/Destruction
				//////////////////////////////////////////////////////////////////////
				
				// 高炮类成员函数
				// 高炮类构造函数
				CTank::CTank()
				{
					m_pointTank.x = 350;
					m_pointTank.y = 450;
					m_bmpTank.LoadBitmap(IDB_TANK);
					BITMAP BM;
					m_bmpTank.GetBitmap(&BM);
					m_nWidth	= BM.bmWidth;
					m_nHeight	= BM.bmHeight;
				}
				// 显示高炮
				void CTank::ShowTank(CDC *pDC, CDC *pMemDC, CRect Client)
				{
					pMemDC->SelectObject(&m_bmpTank);
					pDC->BitBlt(m_pointTank.x, m_pointTank.y,
								m_nWidth, m_nHeight, pMemDC,0,0,SRCAND);
				}
				// 改变位置
				void CTank::ChangePos(int tag)
				{
					if(tag == 0 && m_pointTank.x > 0)
						m_pointTank.x	-= 20;
					else if(tag == 1 && m_pointTank.x+m_nWidth < 798)
						m_pointTank.x	+= 20;
				}