#include <graphics.h>

#include <stdio.h>

#include <time.h>

#include <math.h>

#define _CRT_SECURE_NO_DEPRECATE

#define pi 3.1415926

int main() {

time_t t;

int i = 0;

struct tm* nowTime;

int hour, min, sec;

initgraph(640, 480);

while (1) {

for (i = 0; i <= 59; i++) {

if (i % 5 == 0) {

line(320 + 170 * sin(i * pi / 30), 240 - 170 * cos(i * pi / 30),

320 + 200 * sin(i * pi / 30), 240 - 200 * cos(i * pi / 30));

}

else {

line(320 + 185 * sin(i * pi / 30), 240 - 185 * cos(i * pi / 30),

320 + 200 * sin(i * pi / 30), 240 - 200 * cos(i * pi / 30));

}

}

circle(320, 240, 200);

time(&t);

nowTime = localtime(&t);

hour = nowTime->tm_hour;

min = nowTime->tm_min;

sec = nowTime->tm_sec;

setlinecolor(WHITE);

line(320, 240, 320 + 60 * sin(pi * hour / 6), 240 - 60 * cos(pi * hour / 6));

line(320, 240, 320 + 100 * sin(pi * min / 30), 240 - 100 * cos(pi * min / 30));

line(320, 240, 320 + 160 * sin(pi * sec / 30), 240 - 160 * cos(pi * sec / 30));

Sleep(100);

cleardevice();

}

getchar();

closegraph();

return 0;

}