制作一个钟表

用EasyX制作的一个简易钟表，需设置字符集属性为多字节字符集。效果如下所示：

GIF图会有些闪动，在实际中这种闪动几乎不可见。

#define  _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<graphics.h>
#include<math.h>
#include<stdlib.h>
#define width   900					//屏幕的宽
#define high    600					//屏幕的高
#define P 3.1415926					//圆周率

typedef struct CLOCKDATA
{
	int center_x , center_y ;		//表盘中心，即针的其起点

	int secondLong ;				//秒针的长度
	int secondEnd_x,secondEnd_y;	//秒针终点的位置
	float secondAngle;				//秒针单位转动角度

	int minuteLong;					//分针的长度
	int minuteEnd_x, minuteEnd_y;	//分针终点的位置
	float minuteAngle;				//分针单位转动角度

	int hourLong;					//分针的长度
	int hourEnd_x, hourEnd_y;		//时针终点的位置
	float hourAngle;				//时针单位转动角度

	int R_dial;						//表盘半径
	int scale;						//刻度到表盘中心的距离

	SYSTEMTIME time;				//系统时间
}Clock;

void showDial(Clock *clock);		//打印表盘
void Init(Clock *clock);			//初始化
void UpdatePtrPos(Clock *clock);	//更新指针的位置
void showHour(Clock *clock);		//显示时针
void showMinute(Clock *clock);		//显示分针
void showSecond(Clock *clock);		//显示秒针
void  showTime(Clock *clock);		//显示时间

void showDial(Clock *clock)
{
	setlinecolor(WHITE);									//设置划线颜色
	circle(clock->center_x, clock->center_y, clock->R_dial);//画表盘的圆

	//显示0、3、6、9刻度，用黄边红圆表示
	setfillcolor(RED);
	setcolor(YELLOW);
	int cir1_x = clock->center_x;
	int cir1_y = clock->center_y - clock->secondLong - 25;
	fillcircle(cir1_x, cir1_y, 5);							//画填充圆

	setfillcolor(RED);
	setcolor(YELLOW);
	int cir2_x = clock->center_x + clock->secondLong + 25;
	int cir2_y = clock->center_y;
	fillcircle(cir2_x, cir2_y, 5);

	setfillcolor(RED);
	setcolor(YELLOW);
	int cir3_x = clock->center_x;
	int cir3_y = clock->center_y + clock->secondLong + 25;
	fillcircle(cir3_x, cir3_y, 5);

	setfillcolor(RED);
	setcolor(YELLOW);
	int cir4_x = clock->center_x- clock->secondLong - 25;
	int cir4_y = clock->center_y ;
	fillcircle(cir4_x, cir4_y, 5);
}

void Init(Clock *clock)
{
	initgraph(width, high);			//生成显示钟表的窗口

	clock->center_x = width / 2;	//表盘中心坐标
	clock->center_y = high / 2;

	clock->secondLong = width / 5;	//秒针长度
	clock->minuteLong = width / 6;	//分针长度
	clock->hourLong = width / 7;	//时针长度

	clock->R_dial = width / 4;		//表盘半径

	clock->scale = width / 4 + 30;

	showDial(clock);			
}

void  UpdatePtrPos(Clock *clock)
{
	GetLocalTime(&(clock->time));	//获取时间

	//秒针转动
	clock->secondAngle = (float)(clock->time.wSecond * 2 * P / 60);  //根据时间秒数计算出秒针角度
	clock->secondEnd_x = (int)(clock->center_x + clock->secondLong*sin(clock->secondAngle));//计算秒针终点坐标
	clock->secondEnd_y = (int)(clock->center_y - clock->secondLong*cos(clock->secondAngle));

	//分针转动
	clock->minuteAngle = (float)(clock->time.wMinute * 2 * P / 60);//根据时间分钟数计算出秒针角度
	clock->minuteEnd_x = (int)(clock->center_x + clock->minuteLong*sin(clock->minuteAngle));
	clock->minuteEnd_y = (int)(clock->center_y - clock->minuteLong*cos(clock->minuteAngle));
																						  
	//时针转动
	clock->hourAngle = (float)(clock->time.wHour * 2 * P / 12);//根据时间小时数计算出秒针角度
	clock->hourEnd_x = (int)(clock->center_x + clock->hourLong*sin(clock->hourAngle));
	clock->hourEnd_y = (int)(clock->center_y - clock->hourLong*cos(clock->hourAngle));
}

void showHour(Clock *clock)  //用红色显示时针
{
	setlinestyle(PS_SOLID,2);
	setcolor(RED);
	line(clock->center_x, clock->center_y, clock->hourEnd_x, clock->hourEnd_y);
}

void showMinute(Clock *clock)//用蓝色显示时针
{
	setlinestyle(PS_SOLID, 2);
	setcolor(BLUE);
	line(clock->center_x, clock->center_y, clock->minuteEnd_x, clock->minuteEnd_y);
}

void showSecond(Clock *clock)//用白色显示时针
{
	setlinestyle(PS_SOLID, 2);
	setcolor(WHITE);
	line(clock->center_x, clock->center_y, clock->secondEnd_x, clock->secondEnd_y);

	FlushBatchDraw();
	Sleep(10);

	setcolor(BLACK);
	line(clock->center_x, clock->center_y, clock->secondEnd_x, clock->secondEnd_y);

	if (clock->time.wSecond == 0)//每到一分钟就清空一次表盘
	{
		clearcircle(clock->center_x, clock->center_y, clock->secondLong); 
	}
}

void  showTime(Clock *clock)
{
	char  year[10] = " ", month[10] = " ",day[10] = " ", week[10] = " ";
	char  hour[10] = " ", minute[10] = " ", second[10] = " ";
	sprintf(year, "%d /", clock->time.wYear);
	sprintf(month, "%d /", clock->time.wMonth);
	sprintf(day, "%d ", clock->time.wDay);
	sprintf(week, "星期 %d", clock->time.wDayOfWeek);

	sprintf(hour, "%d 时", clock->time.wHour);
	if (clock->time.wMinute<10)
		sprintf(minute, "0%d 分", clock->time.wMinute);
	else
		sprintf(minute, "%d 分", clock->time.wMinute);
	if (clock->time.wSecond<10)
		sprintf(second, "0%d 秒", clock->time.wSecond);
	else
		sprintf(second, "%d 秒", clock->time.wSecond);

	settextstyle(15, 15, "楷体");
	setcolor(WHITE);
	outtextxy(clock->center_x - 125, clock->center_y + clock->R_dial + 15, hour);
	outtextxy(clock->center_x -25, clock->center_y + clock->R_dial + 15, minute);
	outtextxy(clock->center_x +75, clock->center_y + clock->R_dial + 15, second);

	outtextxy(clock->center_x - 150, clock->center_y + clock->R_dial + 50,year);
	outtextxy(clock->center_x - 50, clock->center_y + clock->R_dial + 50,month);
	outtextxy(clock->center_x +50, clock->center_y + clock->R_dial + 50,day);
	outtextxy(clock->center_x + 150, clock->center_y + clock->R_dial + 50, week);
	if (clock->time.wMilliseconds == 0)//每到一秒就清空一次显示时间的区域
	{
		clearrectangle(clock->center_x - 160, clock->center_y + clock->R_dial + 5, clock->center_x + 250, clock->center_y + clock->R_dial + 70);
	}
	
}

int  main()
{
	Clock clock;
	Init(&clock);
	while (1)
	{
		UpdatePtrPos(&clock); //更新钟表时分秒针位置
		showSecond(&clock);
		showMinute(&clock);
		showHour(&clock);
		showTime(&clock);
	}
	EndBatchDraw();
	system("pause");
	return  0;
}

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