钟表小程序

#include <graphics.h>
#include <conio.h>
#include <math.h>
#define PI 3.1415926 void Draw(int hour, int minute, int second)
{
double a_hour, a_min, a_sec; // 时、分、秒针的弧度值
int x_hour, y_hour, x_min, y_min, x_sec, y_sec; // 时、分、秒针的末端位置 // 计算时、分、秒针的弧度值
a_sec = second * 2 * PI / 60;
a_min = minute * 2 * PI / 60 + a_sec / 60;
a_hour= hour * 2 * PI / 12 + a_min / 12; // 计算时、分、秒针的末端位置
x_sec = 320 + (int)(120 * sin(a_sec));
y_sec = 240 - (int)(120 * cos(a_sec));
x_min = 320 + (int)(100 * sin(a_min));
y_min = 240 - (int)(100 * cos(a_min));
x_hour= 320 + (int)(70 * sin(a_hour));
y_hour= 240 - (int)(70 * cos(a_hour)); // 画时针
setlinestyle(PS_SOLID, NULL, 10);
setcolor(WHITE);
line(320, 240, x_hour, y_hour); // 画分针
setlinestyle(PS_SOLID, NULL, 6);
setcolor(LIGHTGRAY);
line(320, 240, x_min, y_min); // 画秒针
setlinestyle(PS_SOLID, NULL, 2);
setcolor(RED);
line(320, 240, x_sec, y_sec);
} void main()
{
initgraph(640, 480); // 初始化 640 x 480 的绘图窗口 // 绘制一个简单的表盘
circle(320, 240, 2);
circle(320, 240, 60);
circle(320, 240, 160);
outtextxy(296, 300, "dxdxdx");
outtextxy(380, 125, " 1");
outtextxy(428, 170, "2");
outtextxy(450, 230, "3");
outtextxy(430, 300, "4");
outtextxy(380, 350, "5");
outtextxy(315, 370, "6");
outtextxy(250, 350, "7");
outtextxy(205, 300, "8");
outtextxy(190, 230, "9");
outtextxy(250, 125, "11");
outtextxy(205, 170, "10");
outtextxy(315, 100, "12");
// 设置 XOR 绘图模式
setwritemode(R2_XORPEN); // 设置 XOR 绘图模式 // 绘制表针
SYSTEMTIME ti; // 定义变量保存当前时间
while(!kbhit()) // 按任意键退出钟表程序
{
GetLocalTime(&ti); // 获取当前时间
Draw(ti.wHour, ti.wMinute, ti.wSecond); // 画表针
Sleep(1000); // 延时 1 秒
Draw(ti.wHour, ti.wMinute, ti.wSecond); // 擦表针（擦表针和画表针的过程是一样的）
} closegraph(); // 关闭绘图窗口
}

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