運動的時鐘

#include <graphics.h>
#include <conio.h>
#include <math.h>
#define Width 640
#define Height 480
#define PI 3.14159
int main()
{
    // 初始化繪圖視窗
    initgraph(640, 480, SHOWCONSOLE);
    //秒針起始座標
    int center_x = Width / 2, center_y = Height / 2;
    //秒針終點座標
    int secondEnd_x, secondEnd_y;
    //分針終點座標
    int minuteEnd_x, minuteEnd_y;
    //時針終點座標
    int hourEnd_x, hourEnd_y;
    //秒針長度
    int secondLength = Width / 4;
    //分針長度
    int minuteLength = Width / 5.5;
    //時針長度
    int hourLength = Width / 7;
    //秒針對應轉到角度
    float secondAngle = 0;
    //分針對應轉到角度
    float minuteAngle = 0;
    //時針對應轉到角度
    float hourAngle = 0;
    //定義變數儲存系統時間
    SYSTEMTIME ti;
    BeginBatchDraw();
    while (1)
    {
        setfillcolor(YELLOW);
        setlinestyle(PS_DASHDOTDOT, 5);
        setlinecolor(0x555555);
        circle(center_x, center_y, secondLength + 30);
        setcolor(0xAAAAAA);
        setlinestyle(PS_DOT | PS_ENDCAP_SQUARE, 2);
        circle(center_x, center_y, secondLength + 15);
        for (int i = 0; i < 12; i++)
        {
            int x = center_x + cos(i * 30.0 / 360 * 2 * PI) * (secondLength + 15.0);
            int y = center_y - sin(i * 30.0 / 360 * 2 * PI) * (secondLength + 15.0);
            fillcircle(x, y, 5);
        }
        GetLocalTime(&ti);
        secondAngle = (ti.wSecond / 60.0) * (2 * PI);
        minuteAngle = (ti.wMinute / 60.0) * (2 * PI);
        hourAngle = ((ti.wHour % 12) / 12.0) * (2 * PI) + (ti.wMinute / 60.0) * (2 * PI / 12.0);
        secondEnd_x = center_x + secondLength * sin(secondAngle);
        secondEnd_y = center_y - secondLength * cos(secondAngle);
        minuteEnd_x = center_x + minuteLength * sin(minuteAngle);
        minuteEnd_y = center_y - minuteLength * cos(minuteAngle);
        hourEnd_x = center_x + hourLength * sin(hourAngle);
        hourEnd_y = center_y - hourLength * cos(hourAngle);
        //畫秒針
        setlinestyle(PS_SOLID, 1);
        setcolor(WHITE);
        line(center_x, center_y, secondEnd_x, secondEnd_y);
        //畫分針
        setlinestyle(PS_SOLID, 2);
        setcolor(GREEN);
        line(center_x, center_y, minuteEnd_x, minuteEnd_y);
        //畫時針
        setlinestyle(PS_SOLID, 5);
        setcolor(RED);
        line(center_x, center_y, hourEnd_x, hourEnd_y);
        FlushBatchDraw();
        setlinestyle(PS_SOLID, 1);
        setcolor(BLACK);
        line(center_x, center_y, secondEnd_x, secondEnd_y);
        setlinestyle(PS_SOLID, 2);
        setcolor(BLACK);
        line(center_x, center_y, minuteEnd_x, minuteEnd_y);
        setlinestyle(PS_SOLID, 5);
        setcolor(BLACK);
        line(center_x, center_y, hourEnd_x, hourEnd_y);
    }
    EndBatchDraw();
    system("pause");
    closegraph();
    return 0;
}

結果：