139.c

C++游戏开发书籍的实例非常适合初学但又又想往游戏开发方面发展的人学习哦

#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(BLACK);
	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();
}