纯代码写一个时钟程序（C语言）
/*
功能：显示时间
文中有注释
编译器以及环境：VS2013/WINDOWS7
完整代码如下：
*/
#include<graphics.h>
#include<time.h>
#include<math.h>
#include<conio.h>
#include<stdio.h>
#define PI 3.141592653589793
//画时钟盘
void draw();
//画表针
void drawHand(int hour, int minute, int second, int Milliseconds);
//显示年月日 星期
void showDate(int year, int month, int date, int day);
int main()
{
//创建窗口
initgraph(600, 600);
setwritemode(R2_XORPEN);
//画时钟盘
draw();
//画表针
//drawHand();
//定义时间变量保存时间
SYSTEMTIME ti;
while(1)
{
//获取当前时间
GetLocalTime(&ti);
//动态画时钟指针
drawHand(ti.wHour, ti.wMinute, ti.wSecond, ti.wMilliseconds);
//显示上午AM 或下午PM
setbkmode(TRANSPARENT);
if (ti.wHour>0 && ti.wHour<12)
{
outtextxy(75, 70, _T('AM.'));
}
else
{
outtextxy(75, 70, _T('PM.'));
}
//显示年月日 星期
showDate(ti.wYear, ti.wMonth,ti.wDay, ti.wDayOfWeek);
//每隔1毫秒重画时钟指针
Sleep(999);
drawHand(ti.wHour, ti.wMinute, ti.wSecond, ti.wMilliseconds);
}
/*
typedef struct _SYSTEMTIME {
WORD wYear;
WORD wMonth;
WORD wDayOfWeek;
WORD wDay;
WORD wHour;
WORD wMinute;
WORD wSecond;
WORD wMilliseconds;
} SYSTEMTIME, *PSYSTEMTIME, *LPSYSTEMTIME;
*/
closegraph();
return 0;
}
//绘制表针
void drawHand(int hour, int minute, int second,int Milliseconds)
{
//对应表盘偏转弧度制 12点位置定了0度 h m s分别表示时/分/秒对应弧度
double h, m, s;
//以中心为起点针的绘制的结束点位置坐标
double xh, yh, xm, ym, xs, ys;
//每毫秒所有针转过弧度值
double a = PI / 30000.0;
//表盘中最小刻度弧度值
double b = PI/30.0;
//设置坐标原点
setorigin(300, 300);
//设置分针长180 / 时针长155 / 秒针长190
//利用三角函数求出针所在位置
//y轴正方向朝下
s = second*1000.0 * a;
m = minute*b+second*50/3*a;
h = hour*b*5+minute*b/12;
xh = 155.0 * sin(h);
yh = 155.0 * cos(h);
xm = 180.0 * sin(m);
ym = 180.0 * cos(m);
xs = 190.0 * sin(s);
ys = 190.0 * cos(s);
//绘制秒针
setlinestyle(PS_SOLID | PS_JOIN_ROUND | PS_ENDCAP_ROUND, 3);
setlinecolor(RED);
line(0, 0, xs, -ys);
//绘制分针
setlinestyle(PS_SOLID | PS_JOIN_ROUND | PS_ENDCAP_ROUND, 5);
setlinecolor(GREEN);
line(0, 0, xm, -ym);
//绘制时针
setlinestyle(PS_SOLID | PS_JOIN_ROUND | PS_ENDCAP_ROUND, 10);
setlinecolor(GREEN);
line(0, 0, xh, -yh);
}
//画时钟盘
void draw()
{
//这种窗口中心为原点
setorigin(300, 300);
//绘制外圆
circle(0, 0, 250);
//绘制内圆
circle(0, 0, 225);
//绘制针轴小圆点
circle(0, 0, 2);
//辅助圆
//circle(0, 0, 190);
//绘制刻度
int x, y,x1,y1;
for (int i = 0; i < 60;i++)//2*PI=360度 时刻度间隔弧度为2*PI/12即PI/6 ； 分刻度间隔弧度为2*PI/60
{
//设置字体
settextstyle(22, NULL, _T('楷体'));
x = 220*sin(i*PI/30);
y = 220*cos(i*PI/30);
x1 = 210 * sin(i*PI/30);
y1 = 210 * cos(i*PI/30);
//翻转坐标成数学坐标
y = -1 * y;
y1 = -1 * y1;
switch(i)
{ //绘制3，6，9，12数字对应的位置
//不用使用for循环因为了方便微调各个数字文本坐标
case 0:
outtextxy(x1-10, y1-4, _T('12'));
break;
case 15:
outtextxy(x1-8, y1-10, _T('3'));
break;
case 30:
outtextxy(x1-5, y1-15, _T('6'));
break;
case 45:
outtextxy(x1, y1-10, _T('9'));
break;
case 5:
outtextxy(x1-8 , y1-6 , _T('1'));
break;
case 10:
outtextxy(x1-8 , y1-7, _T('2'));
break;
case 20:
outtextxy(x1-7 , y1-14 , _T('4'));
break;
case 25:
outtextxy(x1-6 , y1-14 , _T('5'));
break;
case 35:
outtextxy(x1-3 , y1-13 , _T('7'));
break;
case 40:
outtextxy(x1-1 , y1-12 , _T('8'));
break;
case 50:
outtextxy(x1-2 , y1-7 , _T('10'));
break;
case 55:
outtextxy(x1-2 , y1-7 , _T('11'));
break;
default:
break;
}
if (i % 5 == 0)
{
setfillcolor(RGB(255,255,0));
fillrectangle(x - 4, y - 4, x +4, y +4);
}
else
fillcircle(x, y, 2);
}
}
//显示年/月/日 星期几
void showDate(int year, int month, int date ,int day)
{
setorigin(0, 0);
//struct dday
//{
wchar_t y[10];
wchar_t m[10];
wchar_t d[10];
wchar_t wd[7][10] = {_T('星期日'),_T('星期一'),_T('星期二'),_T('星期三'),_T('星期四'),_T('星期五'),_T('星期六')};
//}D;
_itow_s(year, y,10);
wcscat(y, _T('年'));
_itow_s(month, m, 10);
wcscat(m,_T('月'));
_itow_s(date, d, 10);
wcscat(d,_T('日'));
//去除文字背景色
setbkmode(TRANSPARENT);
outtextxy(205, 370, y);
outtextxy(285, 370, m);
outtextxy(320, 370, d);
switch (day)
{
case 0:
outtextxy(355, 20, wd[0]);
break;
case 1:
outtextxy(275, 400, wd[1]);
break;
case 2:
outtextxy(355, 20, wd[2]);
break;
case 3:
outtextxy(355, 20, wd[3]);
break;
case 4:
outtextxy(355, 20, wd[4]);
break;
case 5:
outtextxy(355, 20, wd[5]);
break;
case 6:
outtextxy(355, 20, wd[6]);
break;
default:
outtextxy(355, 20, wd[7]);
break;
}
}
//成品截图，因为时钟是动态的，图是静态所以图是不会动的
//流程图