// 头文件

#include <graphics.h>

#include <math.h>

#include <conio.h>

#include <stdio.h>

// 宏定义

#define PI 3.141592654

// 函数声明

void Draw_Dial();                                            // 绘制静态的表盘

void Draw_Hand(int hour, int minute, int secend);            // 绘制表针

//主函数

int main( void )

{

    initgraph(, );                                    // 初始化一个图形界面 640*480

    Draw_Dial();

    setwritemode(R2_XORPEN);                                // 设置XOR绘图模式

    SYSTEMTIME time;                                        // 定义一个时间结构体用来保存当前的时间

    while (!_kbhit())

    {

        GetLocalTime(&time);                                // 获取当前的时间

        Draw_Hand(time.wHour,time.wMinute,time.wSecond);    // 把表针绘制出来

        Sleep();                                        // 间隔1秒(1000毫秒)

        Draw_Hand(time.wHour, time.wMinute, time.wSecond);  // 把表针绘制出来

    }

    closegraph();                                            // 关闭图形界面

    return ;

}

// 绘制静态的表盘

void Draw_Dial()

{

    setcolor(GREEN);                                        // 绘制边界

    circle(, , );                                    // 画圆函数的参数：320 240坐标 160是圆的半径大小

    circle(, , );

    circle(, , );

    // 图形界面的输出文本信息

     outtextxy(, , _T("GOOD GOOD STUDY"));

     outtextxy(, , _T("DAY DAY UP"));

    // 绘制图形刻度

    setcolor(WHITE);

    int x, y;

    for (int i = ; i < ; i++)

    {

        x =  + int( * sin(PI *  * i / ));

        y =  + int( * cos(PI *  * i / ));

        if (i %  == )

        {

            bar(x - , y - , x + , y + );

        }

        else if (i %  == )

        {

            circle(x, y, );

        }

        else

        {

            putpixel(x, y, WHITE);

        }

    }

    // 绘制数字刻度

    for (int i = ; i < ; i++)

    {

        sprintf_s(ch,"%d",i);

        x =  + int( * sin(PI *  * i / ));

        y =  + int( * cos(PI *  * i / ));

        if (i %  == )

        {

            switch (i)

            {

            case :  outtextxy(x, y, _T("")); break;

            case :  outtextxy(x, y, _T(""));  break;

            case : outtextxy(x, y, _T(""));  break;

            case : outtextxy(x, y, _T(""));  break;

            case : outtextxy(x, y, _T(""));  break;

            case : outtextxy(x, y, _T(""));  break;

            case : outtextxy(x, y, _T(""));  break;

            case : outtextxy(x, y, _T(""));  break;

            case : outtextxy(x, y, _T(""));  break;

            case : outtextxy(x, y, _T(""));  break;

            case : outtextxy(x, y, _T("")); break;

            case : outtextxy(x, y, _T("")); break;;

            default: break;

            }

        }

    }

}

// 绘制表针

void Draw_Hand(int hour, int minute, int second)

{

    double h_hour, h_minute, h_second;                                // 三个弧度值

    int x_hour, y_hour, x_minute, y_minute, x_second, y_second;       // 末端位置

    // 计算弧度值

    h_second = second *  * PI / ;

    h_minute = minute *  * PI /  + h_second / ;

    h_hour = hour *  * PI /  + h_minute / ;

    // 计算末端位置

    x_second = int( * sin(h_second));

    y_second=int( * cos(h_second));

    x_minute = int( * sin(h_minute));

    y_minute = int( * cos(h_minute));

    x_hour = int( * sin(h_hour));

    y_hour = int( * cos(h_hour));

    // 绘制秒针

    setlinestyle(PS_SOLID, );                                        // PS_SOILD 实线 2像素 线条的粗细

    setcolor(RED);

    line( + x_second,  - y_second,  - x_second / ,  + y_second / );

    // 绘制分针

    setlinestyle(PS_SOLID, );                                        // PS_SOILD 实线 2像素 线条的粗细

    setcolor(YELLOW);

    line( + x_minute,  - y_minute,  - x_minute / ,  + y_minute/);

    // 绘制时针

    setlinestyle(PS_SOLID, );                                        // PS_SOILD 实线 2像素 线条的粗细

    setcolor(GREEN);

    line( + x_hour,  - y_hour,  - x_hour / ,  + y_hour/);

}