C++实现数字雨

https://blog.csdn.net/qq_36238595/article/details/56682261感谢这篇文章的作者，我是在这个程序基础上修改的。

#include <time.h>
#include <Windows.h>

typedef struct		//记录雨滴的结构体
{
	int x, y;
	char ch;
}RAINDROP;

const int BUFFER_SIZE = 100;
int WIDTH = 80;
int HEIGHT = 30;
const int RAIN_LENGTH = 18;

RAINDROP raindropLine[BUFFER_SIZE];
HANDLE HOUT = GetStdHandle(STD_OUTPUT_HANDLE);//获得标准输出的句柄

void gotoxy(int x, int y)			
{
	COORD pos;	//定义表示一个字符在控制台屏幕上的坐标的对象
	pos.X = x;
	pos.Y = y;
	SetConsoleCursorPosition(HOUT, pos);	//设置控制台标准输出光标位置
}

void show_cursor(BOOL hide)
{
	CONSOLE_CURSOR_INFO cciCursor;
	if (GetConsoleCursorInfo(HOUT, &cciCursor))	//获得光标信息
	{
		cciCursor.bVisible = hide;				//隐藏光标
		SetConsoleCursorInfo(HOUT, &cciCursor);	//重新设置光标
	}
}

void set_color(int color)
{
	SetConsoleTextAttribute(HOUT, color);		//设置输出颜色
}

int main()
{
	CONSOLE_SCREEN_BUFFER_INFO info;
	GetConsoleScreenBufferInfo(HOUT, &info);	//获得控制台窗体信息
	HEIGHT = info.srWindow.Bottom;				//根据控制台的宽高设置显示的宽高
	WIDTH = info.srWindow.Right;
	
	show_cursor(FALSE);
	srand((unsigned int)time(NULL));
	for (int i=0; i<BUFFER_SIZE; i++)			//随机设置雨滴下落的位置
	{
		raindropLine[i].x = rand()%WIDTH;
		raindropLine[i].y = rand()%HEIGHT;
		raindropLine[i].ch = rand() %2 + 48;				//设置雨滴内容0或1
	}
	
	while(true)				
	{
		GetConsoleScreenBufferInfo(HOUT, &info);	//当窗体大小变化时，重新设置宽高信息
		HEIGHT = info.srWindow.Bottom;
		WIDTH = info.srWindow.Right;
		for (int i=0; i<BUFFER_SIZE; ++i)
		{
			if (raindropLine[i].y <= HEIGHT)
			{
				gotoxy(raindropLine[i].x, raindropLine[i].y);
				set_color(FOREGROUND_GREEN);		//设置雨滴颜色
				putchar(raindropLine[i].ch);
			}
			gotoxy(raindropLine[i].x, raindropLine[i].y - RAIN_LENGTH);	//擦除过长的雨滴
			putchar(' ');
			raindropLine[i].y++;
			raindropLine[i].ch = rand() % 2 + 48;
			if (raindropLine[i].y > HEIGHT + RAIN_LENGTH)		
			{
				raindropLine[i].x = rand() % WIDTH;
				raindropLine[i].y = rand() % HEIGHT;
			}
			if ( raindropLine[i].y <= HEIGHT)
			{
				gotoxy(raindropLine[i].x, raindropLine[i].y);
				set_color(FOREGROUND_GREEN|FOREGROUND_INTENSITY);	//高亮最下方的雨滴
				putchar(raindropLine[i].ch);
			}
		}
		Sleep(50);
	}
	getchar();
	return 0;
}

效果图