画面来源于 EasyX的官网，但那个朋友写的代码看不懂（现在不知道能不能看懂. . .）所以我就自己写了一下，结果代码量比它的要少很多 . . .

这个程序是去年刚开学的时候写的，效率可能会低那么一点，因为当时就会 C 和 EasyX，还有略懂一点 C++，希望您喜欢 ^ _ ^

我们可以准备一首好听的音乐，效果如下所示（gif文件播放不了音乐）：

代码如下所示：

#include <graphics.h>
#include <ctime>	
#include <cstdlib>
#include <mmsystem.h>
#pragma comment(lib,"winmm")

class Ob_Fam
{
	struct coord_ch
	{
		int x;
		int y;
		int sj;
	};

	struct Coord
	{
		int x;
		int y;
		coord_ch ch[12];
	};

	static const int RAIN_NUM = 500;

	Coord rain[RAIN_NUM];

	static const int WIDTH = 640;
	static const int HEIGHT = 480;

	static const int WID = 120;		//房子的宽度   相同宽度  便于计算
	static const int HOUSE_NUM = 30;

	Coord house[HOUSE_NUM];

public:
	void InitGra();
	Ob_Fam() {}
	~Ob_Fam() {}

	void RunDownRain();	//开始 下雨
	void DrawHouse();
};
 

int main()
{
	DWORD t1 = timeGetTime(), tt1;
	DWORD t2 = timeGetTime(), tt2;
	srand((unsigned)time(nullptr));

	Ob_Fam myFam;
	myFam.InitGra();


	while (1)
	{
		BeginBatchDraw();

		tt1 = timeGetTime();
		if (tt1 - t1 > 20)				//下雨
		{
			myFam.RunDownRain();
			t1 = tt1;
		}

		tt2 = timeGetTime();
		if (tt2 - t2 > 40)
		{
			cleardevice();
			myFam.DrawHouse();
			t2 = tt2;
		}

		EndBatchDraw();
	}

	return 0;
}

void Ob_Fam::InitGra()
{
	initgraph(WIDTH, HEIGHT);

	setbkcolor(RGB(75, 75, 75));
	cleardevice();

	mciSendString("play bj.mp3 repeat", 0, 0, 0);

	for (int i = 0; i < RAIN_NUM; i++)
	{
		rain[i].x = rand() % (WIDTH + 400) - 200;
		rain[i].y = rand() % HEIGHT;
	}

	for (int i = 0; i < HOUSE_NUM; i++)
	{
		house[i].x = rand() % (WIDTH - WID);
		house[i].y = rand() % 250 + 200;

		for (int j = 0; j < 12; j++)
		{
			house[i].ch[j].x = house[i].x + 10 + (j % 2) * 55;
			house[i].ch[j].y = house[i].y + 10 + (j / 2) * 55;
			house[i].ch[j].sj = rand() % 12;
		}
	}
	setlinecolor(RGB(50, 50, 50));
}

void Ob_Fam::RunDownRain()
{
	for (int i = 0; i < RAIN_NUM; i++)
	{
		putpixel(rain[i].x, rain[i].y, WHITE);

		rain[i].x += 2;
		rain[i].y += 4;

		if (rain[i].y > HEIGHT)
		{
			rain[i].x = rand() % (WIDTH + 400) - 200;
			rain[i].y = -10;
		}
	}
}

void Ob_Fam::DrawHouse()
{
	for (int i = 0; i < HOUSE_NUM; i++)
	{
		setfillcolor(RGB(40, 40, 40));
		fillrectangle(house[i].x, house[i].y, house[i].x + WID, HEIGHT);
		house[i].x -= 5;

		for (int j = 0; j < 12; j++)
		{
			setfillcolor(RGB(50, 50, 50));
			if (house[i].ch[j].sj > 6)
			{
				if (house[i].ch[j].sj > 9)
					setfillcolor(RGB(255, 255, 220));
				else
					setfillcolor(YELLOW);
			}

			fillrectangle(house[i].ch[j].x, house[i].ch[j].y, house[i].ch[j].x + 45, house[i].ch[j].y + 45);
			house[i].ch[j].x -= 5;
		}

		if (house[i].x < -WID)
		{
			house[i].x = WIDTH + rand() % 100;
			house[i].y = rand() % 250 + 200;

			for (int j = 0; j < 12; j++)
			{
				house[i].ch[j].x = house[i].x + 10 + (j % 2) * 55;
				house[i].ch[j].y = house[i].y + 10 + (j / 2) * 55;
				house[i].ch[j].sj = rand() % 12;
			}
		}
	}
}