声图并茂

声图并茂

本程序将用动画功能在屏幕上画一个运行着的钟表表盘，钟表显示的时间与系统
时间相同，而且伴随着秒针的走动，将不断发出“嗒嗒”声，当时间为整点时，还将
用5声底1声高的响声报告整点。
表盘的动画用换页方式实现，报时声用sound( )函数实现，用gettime( )函数检
测系统时间。

#include<math.h>
#include<dos.h>
#include<graphics.h>
#define CENTERX 320 /*表盘中心位置*/
#define CENTERY 175
#define CLICK 100 /*喀嗒声频率*/
#define CLICKDELAY 30 /*喀嗒声延时*/
#define HEBEEP 10000 /*高声频率*/
#define LOWBEEP 500 /*低声频率*/
#define BEEPDELAY 200 /*报时声延时*/

/*表盘刻度形状*/
int Mrk_1[8]={-5,-160,5,-160,5,-130,-5,-130, };
int Mrk_2[8]={-5,-160,5,-160,2,-130,-2-130, };

/*时针形状*/
int HourHand[8]={-3,-100,3,-120,4, 10,-4,10};

/*分针形状*/
int MiHand[8]={-3,-120,3,-120,4, 10,-4,10};

/*秒针形状*/
int SecHand[8]={-2,-150,2,-150,3, 10,-3,10};

/*发出喀嗒声*/
void Click()
{
sound(CLICK);
delay(CLICKDELAY);
nosound();
}

/*高声报时*/
void HighBeep()
{
sound(HEBEEP);
delay(BEEPDELAY);
nosound;
}

/*低声报时*/
void LowBeep()
{
sound(LOWBEEP);
}

/*按任意角度画多边形*/
void DrawPoly(int *data,int angle,int color)
{
int usedata[8];
float sinang,cosang;
int i;
sinang=sin((float)angle/180*3.14);
cosang=cos((float)angle/180*3.14);
for(i=0;i<8;i+=2)
{
usedata[i] =CENTERX+ cosang*data[i]-sinang*data[i+1]+.5;
usedata[i+1]=CENTERY+sinang*data[i]+cosang*data[i+1]+.5;
}
setfillstyle(SOLID_FILL,color);
fillpoly(4,usedata);
}

/*画表盘*/
void DrawClock(struct time *cutime)
{
int ang;
float hourrate,minrate,secrate;

setbkcolor(BLUE);
cleardevice();
setcolor(WHITE);

/* 画刻度*/
for(ang=0;ang<360;ang+=90)
{
DrawPoly(Mrk_1,ang,WHITE);
DrawPoly(Mrk_2,ang+30,WHITE);
DrawPoly(Mrk_2,ang+60,WHITE);
}
secrate=(float)cutime->ti_sec/60;
minrate=((float)cutime->ti_min+secrate)/60;
hourrate=(((float)cutime->ti_hour/12)+minrate)/12;
ang=hourrate*360;
DrawPoly(HourHand,ang,YELLOW);/*画时针*/
ang=minrate*360;
DrawPoly(MiHand,ang, GREEN);/*画分针*/
ang=secrate*360;
DrawPoly(SecHand,ang, RED);/*画秒针*/
}
main()
{
int gdriver=EGA,
gmode=EGAHI;
int curpage;
struct time curtime ,newtime ;
initgraph(&gdriver,&gmode,"c://tc");
setbkcolor(BLUE);
cleardevice();
gettime(&curtime);
curpage=0;
DrawClock(&curtime);
while(1)
{
if(kbhit())
break; /*按任意键退出*/
gettime(&newtime); /*检测系统时间*/
if(newtime.ti_sec!=curtime.ti_sec)/*每1秒更新一次时间*/
{
if(curpage==0)
curpage=1;
else
curpage=0;
curtime=newtime;
/*设置绘图页*/
setactivepage(curpage);
/*在图页上画表盘*/
DrawClock(&curtime);
/*设置绘图页为当前可见页*/
setvisualpage(curpage);
/*0分0秒高声报时*/
if(newtime.ti_min==0&&newtime.ti_sec==0)
HighBeep();
/* 59分55至秒时低声报时*/
else if(newtime.ti_min==59&&
newtime.ti_sec<=59)
LowBeep();/*其他时间只发出喀嗒声*/
else
Click();
}
}
closegraph();
}