c++游戏教程使用easyx做出大飞机

// 全局画板
IMAGE bk;
IMAGE BK;
IMAGE Plane;
IMAGE Diren;
IMAGE Zidan;

//预加载资源，需要加载了之后才能用
void loadRes()
{
	loadimage(&bk, _T("res\\bg.png"));
	loadimage(&BK, _T("res\\bg.png"));
	loadimage(&Plane, _T("res\\plane.png"));
	loadimage(&Diren, _T("res\\diren.png"));
	loadimage(&Zidan, _T("res\\zidan.png"));
}

struct ZIDAN
{
	int x;
	int y;
};
struct DIREN
{
	int x;
	int y;
};

bool isPeng(int x2,int y2,int x1,int y1)
{
	int result=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2);
	if(result<2500)
	{
		return true;
	}
	return false;
}

	//判断子弹和飞机是否相撞
		for(i=0;i<8;i++)
		{
			for(int j=0;j<5;j++)
			{
				if(isPeng(zidans[j].x,zidans[j].y,direns[i].x+25,direns[i].y+15))
				{
					direns[i].y = -100;
				}
			}
		}

		if (_kbhit()) 
		{
			char ch = _getch();
			if (ch == 'w') 
			{
				planeY-=5;
			}
			if(ch == 's')
			{
				planeY+=5;
			}
			if(ch == 'a')
			{
				planeX-=5;
			}
			if(ch == 'd')
			{
				planeX+=5;
			}
		}