程序代码：

#include<graphics.h>
#include<stdlib.h>
#include<stdio.h>
#include<dos.h>
#include<conio.h>
#include<mouse.c>
#define PIXEL_COUNT 1000

int main(void)
{
    int gdriver=DETECT,gmode,errorcode;
    int i,x,y,color,maxx,maxy,maxcolor,seed;
    int m,n,sta;

    cleardevice;
    initgraph(&gdriver,&gmode,"c:\\borlandc\\bgi");
    errorcode=graphresult();
    if(errorcode!=grOk)
    {
        printf("graphics error:%s\n",grapherrormsg(errorcode));
        printf("press any key to halt:");
        getch();
        exit(1);
    }
    maxx=getmaxx()+1;
    maxy=getmaxy()+1;
    maxcolor=getmaxcolor()+1;
    setcolor(YELLOW);
    settextstyle(TRIPLEX_FONT,HORIZ_DIR,4);
    settextjustify(CENTER_TEXT,CENTER_TEXT);
    outtextxy(maxx/2,400,"Welcome to Smart Home");

    while(!kbhit())
    {
        seed=random(32767);
        srand(seed);
        for(i=0;i<PIXEL_COUNT;i++)
        {
            x=random(maxx);
            y=random(maxy);
            color=random(maxcolor);
            putpixel(x,y,color);

        }
        delay(250);
        srand(seed);
        for(i=0;i<PIXEL_COUNT;i++)
        {
            x=random(maxx);
            y=random(maxy);
            color=random(maxcolor);
            if(color==getpixel(x,y))
              putpixel(x,y,0);
        }
    }
    getch();
    cleardevice;
    initmouse();
    showcur();
    setbkcolor(LIGHTCYAN);
    setfillstyle(1,GREEN);
    bar(350,80,500,200);
    bar(100,80,250,200);
    settextstyle(3,HORIZ_DIR,3);
    settextjustify(LEFT_TEXT,0);
    outtextxy(362,140,"Refrigerator");
    settextjustify(LEFT_TEXT,0);
    outtextxy(108,140,"Air-condition");
    while(1)
    {
    status(&m,&n,&sta);
    if(sta&1&&m>350&&m<500&&n>80&&n<200)
    {
      hidecur();
      exit(1);
    }
    }
    getch();
    closegraph();
    return 0;
}