问题标题: 代码雨

#include<bits/stdc++.h>
#include <time.h>
#include <Windows.h>

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

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

RAIN** 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;
}