80行代码还原《黑客帝国》数字雨效果！基于C+EasyX实现！

代码不是太难，就是那几十行代码，希望对初学者有所帮助 ^ _ ^

效果如下所示：

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代码如下所示：

#include <graphics.h>
#include <Windows.h>
#include <ctime>
#include <cstdlib>

class my_ob_Rain
{
private:
	struct my_str_Rain
	{
		int x;
		int y;
	};

	const static int NUM = 20;
	my_str_Rain arr[NUM];

public:
	void InitGraSizeAndRain();
	void Init_rain(int n);
	void Print_Rain(int n);
	void Rain_Move();
};

int main()
{
	srand((unsigned)time(0));
	my_ob_Rain rain;

	rain.InitGraSizeAndRain();
	DWORD t1 = GetTickCount(), tt1;
	BeginBatchDraw();
	while (1)
	{
		tt1 = GetTickCount();
		if (tt1 - t1 > 20) {
			cleardevice();
			rain.Rain_Move();
			t1 = tt1;
			EndBatchDraw();
		}
	}

	return 0;
}


void my_ob_Rain::InitGraSizeAndRain()
{
	initgraph(640, 480);

	for (int i = 0; i < NUM; i++)
		Init_rain(i);
}


void my_ob_Rain::Init_rain(int n)
{
	arr[n].x = rand() % 640;
	arr[n].y = rand() % 480;
}

void my_ob_Rain::Print_Rain(int n)
{
	settextcolor(GREEN);
	for (int i = 0; i < 6; i++)
	{
		int x = 255 - i * 40;
		settextcolor(RGB(0, x, 0));
		outtextxy(arr[n].x, arr[n].y - i * 20, rand() % 2 + 48);
	}
}

void my_ob_Rain::Rain_Move()
{
	for (int i = 0; i < NUM; i++)
	{
		Print_Rain(i);
		arr[i].y += 5;

		if (arr[i].y > 600)
		{
			arr[i].x = rand() % 640;
			arr[i].y = rand() % 50 - 70;
		}
	}
}